GM Block & Head Casting Numbers

Chevy Block Casting Numbers Use these casting numbers to identify the block you have. Small Block Casting numbers Casting Number Years CID Comments 330817 70-80 400 Car & Truck 2 & 4-bolt 3-freeze plugs 355909 75-79 262/305 car & Truck 2-bolt 360851 75-76 262 2-bolt 361979 76-79 305 car & Truck 2-bolt 366245 78-82 350 Bowtie High tin 4-bolt 366286 82 350 Bowtie aluminum 4-bolt siamesed 366287 82 350 Bowtie aluminum 4-bolt siamesed 366299 82 350 Bowtie aluminum 4-bolt 389257 67 302 2-bolt 391436 68-73 307 2-bolt 393288 65-67 283 2-bolt 460703 78 350 4-bolt 460776 76-79 305 Car & Truck 2-bolt 460777 76-79 305 Car & Truck 2-bolt 460778 76-79 305 2-bolt 471511 79-82 267 Car & Truck 2-bolt 3556519 58-61 283 2-bolt 3703524 55 265 car & Corvette no oil filter 2-Bolt 3720991 55-56 265 Car & Truck 2-bolt 3731548 57 283 Car & Truck 2-bolt No side mount 3737737 57-62 283 2-bolt 3737739 57-62 283 2-bolt 3756519 58-62 283 2-bolt 3782870 62-67 327 car & Truck 2-bolt 3789817 62-67 327 2-bolt 3789935 61-66 283 car & Truck 2-bolt 3790721 64-67 327 2-bolt Chevy II Nova Recessed filter 3791362 66-67 327 2-bolt Chevy II Nova Recessed filter 3791363 66-67 327 2-bolt Chevy II Nova Recessed filter 3792563 65 327 2-bolt 3792582 64-65 283 2-bolt 3794226 57-63 283 2-boltTruck 3794460 68-69 327 2-bolt 3814660 68-69 327 2-bolt 3830944 63 327 2-bolt 3834810 65-67 283 car & Truck 2-bolt 3834812 62-63 283 2-bolt 3837739 58-62 283 2-bolt 3849852 57-66 283 car & Truck 2-bolt 3849859 57-66 283 car & Truck 2-bolt 3849935 65-67 283 2-bolt 3858174 64-67 327 car & Truck 2-bolt 3858180 64-67 327 2-bolt 3858618 68-76 350 2 & 4-Bolt 3862194 65-67 283 2-bolt Chevy II Nova Recessed filter 3864812 62-67 283 car & Truck 2-bolt 3892657 64-67 302/327/350 car & Truck 2-bolt 3892659 68-69 327 2-bolt Large journal 3896944 67 283 2-bolt 3896948 66-67 283 2-bolt 3903352 67 327 2-bolt 3914635 68-73 307 car & Truck 2-bolt 3914636 68-73 307 car & Truck 2-bolt 3914638 68 327 2-bolt 3914653 68 307 2-bolt 3914660 68-69 327 car & Truck 2-bolt 3914678 68-79 302/327/350 car & Truck 2-bolt 3931174 68 307 2-bolt Truck 3932371 69-73 307 car & Truck 2-bolt 3932373 69-73 307 car & Truck 2-bolt 3932386 68-74 302-327-350 2 & 4-Bolt 3932388 68-79 350 car & Truck 4-Bolt 3932442 67 350 2-bolt Camaro 3933180 68-69 327 car & Truck Large journal 2-Bolt 3951509 70-80 400 car & Truck 2 & 4-Bolt 2-freeze plugs 3951511 70-80 400 car & Truck 2 & 4-Bolt 3-freeze plugs 3956618 68-79 302/327/350 2 & 4-Bolt 3956632 69-73 307 car & Truck 2-bolt 3959512 62-63 327 2-bolt 3970010 69-79 302/350 car & Truck 2 & 4-Bolt Most common 3970014 68-79 350 car & Truck 2 & 4-Bolt 3970020 69-73 307 car & Truck 2-bolt 3970024 69-73 307 car & Truck 2-bolt 3992386 68-69 327 car & Truck Large journal 2-Bolt 10036033 350 4-bolt Mexico cast Crate engine 10051182 350 Car and Truck 2 & 4-bolt 1 Piece Seal Passenger stick 10051184 86-up 350 Car & Truck 2 & 4-bolt Passenger stick 1-piece seal 10054727 86-up 350 Car & Truck 2-bolt Passenger stick 1-piece seal 10066036 86-up 350 Car & Truck 2 & 4-bolt Passenger stick 1-piece seal 10066038 350 2 & 4-Bolt Mexico cast Crate engine 10090511 90 350 4-bolt LT-5 ZR-1 10125327 93-up 350 Camaro/firebird 2 & 4-bolt LT-1 Reverse cooling Roller cam 10134996 400 4-bolt Bowtie Aluminum 400 Mains/Bore 10153558 91-92 350 4-bolt LT-5 ZR-1 10168588 94-96 265 2-bolt LT-1 Reverse cooling 10199001 93-95 350 4-bolt LT-5 ZR-1 10243878 96-up 305 2-bolt Vortec Roller 10243880 96-up 350 2 & 4-Bolt Vortec Roller 12550592 97-up 350 Crossbolted LS-1 Aluminum 12551364 98 & UP 365 Gen III 6.0L Iron Block. LQ-4 and LQ-9 12559378 97-up 350 Crossbolted LS-1 Aluminum 12559846 97-up 350 Crossbolted LS-1 Aluminum 12560621 97-up 350 Crossbolted LS-1 Aluminum 12560629 97-up 350 Crossbolted LS-1 Aluminum 12561168 97-up 350 Crossbolted LS-1 Aluminum 12561358 99 & UP 293/325 Gen III 4.8L and 5.3L Iron Block. 12562174 97-up 350 Crossbolted LS-1 Aluminum 12573581 98 & UP 365 Gen III 6.0L Iron Block. LQ-4 and LQ-9 12577184 98 & UP 365 Gen III 6.0L Iron Block. LQ-4 and LQ-9 14010201 80-85 305 car & Truck 2-bolt Passenger stick 14010202 80-85 305 car & Truck 2-bolt Passenger stick 14010203 80-85 305 car & Truck 2-bolt Passenger stick 14010205 80-82 267 car & Truck 2-bolt Passenger stick 14010207 80-85 350 car & Truck 2 & 4-Bolt Passenger stick 14010209 80-85 350 car & Truck 2 & 4-Bolt Passenger stick 14010280 80-82 267 car & Truck 2-bolt Passenger stick 14010287 80-82 350 2-bolt Passenger stick 14011064 80-85 350 4-bolt Passenger stick 14011148 87-89 350 2 & 4-Bolt Roller cam one piece seal 14016376 80-82 267 2-bolt Passenger stick 14016379 77-79 350 2 & 4-Bolt 14016379 77-79 267 2-bolt dipstick in pan 14016381 76-85 305 car & Truck 2-bolt Passenger stick After 79 14016382 80-85 305 2-bolt Passenger stick 14016383 80-85 305 2-bolt Truck 14079287 86-90 350 2-bolt Passenger stick one piece seal 14088526 87-89 350 2-bolt Roller cam Passenger stick 1-piece seal 14088548 86-88 350 2-bolt Truck Passenger stick 1-piece seal 14088551 86-88 305 Car & Truck 2-bolt Passenger stick 1-piece seal 14093627 87-88 305 Car & Truck 2-bolt Passenger stick 1-piece seal 14093638 87-95 350 Car & Truck 2 & 4-bolt Passenger stick 1-piece seal 14094766 86-up 305 2-bolt Passenger stick one piece seal 14101147 86-up 305 2-bolt Passenger stick one piece seal 14101148 86-up 350 2 & 4-Bolt Passenger stick 1-Piece seal Roller cam 14102058 86-88 305 Car & Truck 2-bolt Passenger stick 1-piece seal 14316379 68-88 350 Car & Truck 2-bolt Passenger stick 1-piece seal Big Block Casting numbers Casting Number Years CID Comments 340220 72-76 427 Truck Tall deck 345014 74-86 454 Truck 346236 74-76 454 2-bolt 359070 74-90 454 Truck 361959 73-85 454 Car & Truck 364776 68-84 427 Truck Tall deck 364779 68-88 366 Truck Tall deck 399204 70-71 509 4-Bolt Aluminum Can-AM 399289 73-79 454 2-bolt 399293 77-78 366 Truck 473478 68-84 427 Truck Tall deck 3716362 396 3732755 59-61 348 3732811 58 348 3751872 58 348 3755011 59-61 348 3771705 59-61 348 3782012 58-61 348 3782870 68-76 427 Truck Tall deck 3788068 62 409 3795623 61 409 3798962 62-65 348 Truck 3815707 58-61 348 3824553 66-67 366 Truck 3830814 63 409 3839752 62-63 409 3839754 65 409 3844422 64 409 3855961 66-67 396 2-bolt 3855962 65-66 396 4-Bolt 3855977 65-67 366 Truck Tall deck 3857651 409 Marine 3857655 62-65 348 Truck 3857656 65 409 3857658 409 Marine 3860386 62-64 409 3860387 58 348 3869942 66-67 427 2 & 4-Bolt 3873858 66 396 4-Bolt 3902406 67 396 2 & 4-Bolt 3902466 65-67 396 3904351 67 427 2 & 4-Bolt 3904354 66-67 366 Truck Tall deck 3916319 68-85 366 Truck Tall deck 3916321 68 427 2 & 4-Bolt 3916323 68 396 2 & 4-Bolt 3918319 66-70 366 Truck 3925521 68-85 366 Truck Tall deck 3935439 68-69 427 2 & 4-Bolt 3935440 68-69 396 2 & 4-Bolt 3937724 68-85 366 Truck Tall deck 3937726 68-84 427 Truck Tall deck 3946052 69 427 ZL-I Aluminum 4-Bolt 3946053 97 427 ZL-I Aluminum 4-Bolt 2nd design 3955270 69 427 2 & 4-Bolt 3955272 69 396/402 2 & 4-Bolt 3955274 68-85 366 Truck Tall deck 3955276 68-84 427 Truck Tall deck 3963512 69-71 427/454 2 & 4-Bolt COPO 3963513 73-76 454 3965440 68-69 396 3965449 68-72 396 3969852 68-84 366 Truck 3969854 69-72 396/402/454 2 & 4-Bolt 3969858 68-84 427 Truck Tall deck 3995623 61 409 3999289 72-78 454 Car & Truck 2-Bolt 3999290 72 402 2-bolt 3999293 68-85 366 Truck Tall deck 3999294 68-84 427 Truck Tall deck 6272176 68-76 366 Truck 6272177 72 402 2-bolt 6272181 73-76 427 Truck 10051107 454 4-Bolt Bowtie IV Short deck 10068286 90-91 454 4-Bolt IV Short deck 10069284 427 Truck 10114182 91-95 454 4-Bolt Gen-5 10114183 91-95 366 Truck Gen-5 10114184 91-95 427 Truck Gen-5 10134366 454 4-Bolt Gen-5 Bowtie Tall deck 10185050 454 4-Bolt Gen-5 Bowtie Short deck 10237297 96-up 454 4-Bolt Vortec 7400 Gen-6 10237300 96-up 502 4-Bolt 4.466 bore Gen-6 12550313 91-95 454 4-Bolt Gen-5 12556110 01-up 496 4-Bolt Vortec 8100 Gen-7 14015445 75-90 454 Car & Truck 14015543 87-90 454 4-Bolt Gen-5 14044807 454 4-Bolt IV Bowtie Tall deck 14096859 502 4-Bolt Gen-5 24502504 454 4-Bolt Gen-5 Bowtie Short deck 24502572 4-Bolt DRCE-2 Olds "9.5"" deck" Crankshaft Identification Use these casting numbers to identify the crankshaft you have. Small Block Casting numbers Casting Number CID Years Journals Stroke Comments 1130 307/327 68-73 2.45/2.10 3.25 Nodular Iron 1178 302 2.45/2.10 3 Forged 1181 305/350 68-76 2.45/2.10 3.48 Nodular Iron 1182 350 2.45/2.10 3.48 Forged 2680 327 2.30/2.00 3.25 Forged 2690 350 2.45/2.10 3.48 Forged 3279 302 68-69 2.45/2.10 3 Forged 4577 327 62-67 2.3/2.0 3.25 Nodular Iron 4672 307/327 68-73 2.45/2.10 3.25 Nodular Iron 310514 350 77-85 2.45/2.10 3.48 Nodular Iron 330550 350 73-75 2.45/2.10 3.48 Forged 354431 262 75-76 2.45/2.10 3.1 Nodular Iron 3727449 283 57-67 2.3/2.0 3 Forged 3729449 265 55-57 2.3/2.0 3 Forged 3734627 327 62-67 2.3/2.0 3 Forged 3735236 265/283 55-67 2.3/2.0 3 Forged 3735263 283 57-63 2.3/2.0 3 Forged 3782680 327 62-67 2.3/2.0 3.25 Forged 3814671 327 2.30/2.00 3.25 Forged 3815822 265/283 55-67 2.3/2.0 3 Forged 3835236 283 57-65 2.3/2.0 3 Forged 3836266 265/283 56-63 2.3/2.0 3 Forged 3849847 283 57-67 2.3/2.0 3 Forged 3876764 283 64-67 2.3/2.0 3 Nodular Iron 3876768 283 64-67 2.3/2.0 3 Nodular Iron 3884577 327 2.30/2.00 3.25 Forged 3892690 350 68-85 2.45/2.10 3.48 Forged 3911001 307/327 68-73 2.45/2.10 3.25 Nodular Iron 3911011 307/327 68-73 2.45/2.10 3.25 Nodular Iron 3914672 327 2.45/2.10 3.25 Forged 3923279 302 2.45/2.10 3 Forged 3932442 305/350 69-85 2.45/2.10 3.48 Nodular Iron 3941174 307/327 68-73 2.45/2.10 3.25 Nodular Iron 3941178 302 68-69 2.45/2.10 3 Forged 3941182 350 68-76 2.45/2.10 3.48 Forged 3941188 350 2.45/2.10 3.48 Forged 3949847 283 64-67 2.3/2.0 3 Nodular Iron 3951130 327 2.45/2.10 3.25 Forged 3951529 400 70-80 2.65/2.10 3.75 Nodular Iron 10106122 350 90-95 2.76/2.10 3.66 Forged LT-5 ZR-1 10168568 265 2.45/2.10 3 Cast One Piece Seal 12552216 346 2.558/2.10 3.62 Cast LS-1 One Piece Seal 14088526 305 1986 2.45/2.10 3.48 Nodular Iron One piece seal 14088532 350 86-88 2.45/2.10 3.48 Forged One piece seal 14088535 305/350 86 & UP 2.45/2.10 3.48 Nodular Iron One piece seal 14088552 350 86 & UP 2.45/2.10 3.48 Forged One piece seal Big Block Crankshaft Casting Number CID Years Journals Stroke Comments 3520 454 2.75/2.20 4 Forged 3521 454 70-88 2.75/2.20 4 Forged LS-6 3524 454 2.75/2.20 4 Forged 6223 366/396/402/427 68-76 2.75/2.20 3.76 Forged 7115 366/396/402/427 65-76 2.75/2.20 3.76 Forged 7416 454 70-88 2.75/2.20 4 Forged 7463 454 2.75/2.20 4 Forged 336782 454 2.75/2.20 4 Cast 353039 454 70-88 2.75/2.20 4 Nodular Iron 353638 454 2.75/2.20 4 359730 454 2.75/2.20 4 3732692 348 2.75/2.20 4 3732692 348 1958 2.50/2.20 3.25 Forged 3733223 409 62-65 2.50/2.20 3.5 Forged 3733223 348 2.50/2.20 3.25 Forged 3733226 348 2.50/2.20 3.25 Forged 3733226 348 1958 2.50/2.20 3.25 Forged 3741640 348 2.50/2.20 3.25 Forged 3741640 348 59-61 2.50/2.20 3.25 Forged 3741642 348 2.50/2.20 3.25 Forged 3741642 348 59-61 2.50/2.20 3.25 Forged 3788072 409 1961 2.50/2.20 3.5 Forged 3788072 409 2.50/2.20 3.5 Forged 3795589 409 61-62 2.50/2.20 3.5 Forged 3795589 409 2.50/2.20 3.5 Forged 3804816 366/396/402/427 61-76 2.75/2.20 3.76 Nodular Iron 3815822 348 58-61 2.50/2.20 3.25 Forged 3815822 348 2.50/2.20 3.25 Forged 3824553 348 58-61 2.50/2.20 3.25 Forged 3824553 348 2.50/2.20 3.25 Forged 3829027 409 2.50/2.20 3.5 Forged 3829027 409 1963 2.50/2.20 3.5 Forged 3837466 409/427 2.50/2.20 3.65 Forged Z-11Special performance 3837466 409 1963 2.50/2.20 3.5 Forged Z-11 3838416 409 64-65 2.50/2.20 3.5 Forged 3838416 409 2.50/2.20 3.5 Forged 3856223 396/402 65-71 2.75/2.20 3.76 Nodular Iron 3863114 402 2.75/2.20 3.76 3863144 366/396/402 68-85 2.75/2.20 3.76 Forged 3874874 366/396/402/427 66-85 2.75/2.20 3.76 Forged 3879621 427 2.75/2.20 3.76 Forged 3882841 396 2.75/2.20 3.76 Forged 3882842 366/396/427 2.75/2.20 3.76 Forged 3882849 366/396/427 2.75/2.20 3.76 Forged 3887114 396 2.75/2.20 3.76 Forged Special performance 3904815 366/396/402/427 65-76 2.75/2.20 3.76 Nodular Iron 3962523 454 2.75/2.20 4 Forged 3963521 454 2.75/2.20 4 Forged Special performance 3963524 454 70-72 2.75/2.20 4 Forged 3965746 NA NA NA Semi finished Forged crank 3965753 NA NA NA Semi finished Forged 3967416 454 70-71 2.75/2.20 4 Forged 3967463 454 70-88 2.75/2.20 4 Forged 3975495 454 2.75/2.20 4 3975945 454 2.75/2.20 4 3993804 NA NA NA Raw Forged crank 3993878 454 2.75/2.20 4 Forged 10051169 NA NA NA Raw Forged 10114186 427 2.75/2.20 3.76 Forged 10114187 396 2.75/2.20 3.76 Cast 10114188 454 2.75/2.20 4 Cast One Piece Seal 14097044 454/502 2.75/2.20 4 Forged One Piece Seal Cylinder Head ID Use these casting numbers to identify the heads you have. Small Block Casting numbers Casting Number CID Years Valves Comments 10065202 350 82-86 1.94/1.50 76cc 10065203 350 82-86 1.94/1.50 76cc 10065204 350 82-86 1.94/1.50 76cc 10065205 305 82-86 1.84/1.50 58cc 10065206 350 82-86 1.94/1.50 76cc 10065207 305 82-86 1.84/1.50 58cc 10088113 350 86-92 1.94/1.50 58cc Corvette Aluminum 10120928 350 87-94 1.94/1.50 76cc 10125320 350 94-96 2.00/1.55 Gen II LT1 cast iron version, 10128374 350 92-97 2.00/1.55 Gen II LT1 53 CC angle plug aluminum 10134363 Bowtie High Port 60 CC 210 ~ 258 CC 10159550 350 87-94 1.94/1.50 76cc 10159551 305 87-94 1.84/1.50 58cc 10159552 350 87-94 1.94/1.50 76cc 10159553 305 87-94 1.84/1.50 58cc 10185040 Splayed vavle head 45 CC angle plug 10205245 350 93 2.00/1.55 Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports 10207643 350 94-97 2.00/1.55 Gen II LT1 angle plug aluminum reverse flow cooling 175/68cc ports 10208890 265 94-96 2.00/1.55 Gen II L99 4.3 Liter V-8, cast iron, reverse flow 10215339 346 97 2.00/1.55 Gen III LS1 aluminum 68cc 10239906 305/350 96-up 1.94/1.50 68cc Vortec 12367713 2.00/1.55 GM Fast burn 62 CC 210 CC intake runner angle plug Vortec 12480005 346 0 2.125/1.625 Gen III LS1 "GTZ" aluminum 38cc angle plug 12480011 SB2.2 head 48 ~ 54 CC angle plug 284 CC intake runner Bare heads. 12480034 2.02/1.60 Bowtie Phase III 64cc Angle plug 184 cc intake runner 12506450 350 87-94 1.94/1.50 76cc 12509859 305 87-94 1.84/1.50 58cc 12516852 350 87-94 1.94/1.50 76cc 12551561 350 96 2.00/1.55 Gen II LT1 angle plug aluminum reverse flow cooling 12552520 305 97-99 1.84/1.5 Vortec Truck L-35 12554290 350 94-96 2.00/1.55 Gen II LT1 cast iron version 12555690 350 96 2.00/1.55 Gen II LT-4 55 CC 195 CC intake runner Angle Plug 12555690 350 96 2.00/1.55 Gen II LT-4 55 CC 195 CC intake runner Angle Plug 12556743 325 99 & UP 2.00/1.55 Gen III 5.3L aluminum truck and van 12558059 305 97 1.84/1.5 L-35 Vortec truck 12558062 350 98 1.94/1.5 L-31 Vortec truck 64cc chambers 170cc intake port 12558062 305/350 96-up 1.94/1.50 68cc Vortec 12558806 346 97-98 2.00/1.55 Gen III LS1 aluminum 68cc 12559853 346 99 & UP 2.00/1.55 Gen III LS1 aluminum 68cc 12559895 325 00 & UP 2.00/1.55 Gen III 5.3L aluminum 12564241 346 00 & UP 2.00/1.55 Gen III LS1 aluminum 68cc 12564243 346 2 2.00/1.55 Gen III LS6 aluminum 68cc 12564243 346 2.00/1.55 Gen III LS-6 vette head 65 CC 14008856 267 79-81 1.71/1.50 14010201 305 82-85 1.84/1.50 58cc 14011034 350 80-up 2.02/1.60 64cc Bowtie 14011049 350 82-up 2.02/1.60 64cc Bowtie Aluminum 14014415 267/305 80-85 1.71/1.50 64cc Crack prone 14014416 267/305/350 80-86 1.84/1.50 64cc Crack prone 14019821 350 80-86 1.84/1.50 76cc 14019924 267 79-81 1.71/1.50 14019926 305 80-86 1.84/1.50 14020516 305/350 80-86 1.84/1.50 14020517 350 80-86 1.84/1.50 76cc 14020555 305 81 14020556 350 81 14022206 350 80 1.94/1.50 76cc 14022301 305 80-86 1.84/1.50 58cc 14022601 267/305 79-86 1.72/1.50 1.84/1.50 58cc 14022801 305 80-86 1.72/1.50 58cc 14034806 267 78-82 1.72/1.50 14034807 305 78-82 1.72/1.50 14034808 350 80-86 1.84/1.50 76cc 14034810 350 80-86 14034811 350 80-86 14039121 305 81-86 14039122 305 81-86 14071114 350 80-86 14075381 350 80-86 14079261 350 82-85 14085844 350 80-86 14089119 350 80-86 14096217 350 90-up 1.94/1.50 64cc Crate heads 14101081 305 87-94 1.84/1.50 58cc 14101083 350 88-94 1.94/1.50 64 cc 14102187 305 87-95 1.84/1.50 58cc 14102191 305/350 87-95 1.84/1.50 14102193 305/350 87-95 1.84/1.50 24502559 96-97 Bowtie SB2 1st design"mirror ports" aluminum 25534351C 2.00/1.55 Vortec Bowtie 65 CC 175 cc intake runner 25534371C 2.00/1.55 Vortec Bowtie 65 CC 206 cc intake runner 3238882 350 68-69 1.94/1.50 76cc 3297185 307/327/350 57-67 1.72/1.50 330545 350/400 71-75 2.02/1.60 76cc 330862 400 71-73 1.94/1.50 333881 350 71-76 2.02/1.60 76cc 333882 350/400 70-80 1.94/1.50 76cc 340292 350 73-80 2.02/1.60 64cc Angle plugs turbo' head No heat riser 354434 262/305 75-80 1.72/1.50 60cc 358741 262/305 71--79 1.72/1.50 359944 350 71-79 1.94/1.50 76cc 3636839 265 55 1.72/1.50 3703523 265 55 1.72/1.50 195HP 3713358 265 55-56 1.72/1.50 3713569 265 55-56 1.72/1.50 3725306 265 56 1.72/1.50 210HP Corvette 3731262 265 56 1.72/1.50 Dual Quad Corvette 3731539 283 57-66 1.72/1.50 283HP Corvette 3731544 265/283 55-61 1.72/1.50 Dual Quad Corvette 3731554 265/283 55-63 1.72/1.50 3731556 283 57 1.72/1.50 3731762 265 56 1.72/1.50 Dual Quad Corvette 3737775 283/327 62-67 1.72/1.50 3740997 283 57 1.72/1.50 Dual Quad FI & 4-brl 220-270HP 3743056 283 58 1.72/1.50 3743096 327 62-67 1.72/1.50 3747363 265 57-62 1.72/1.50 3748056 327 62-67 1.72/1.50 3748720 283 57-58 1.72/1.50 Dual Quad FI & 4-brl Corvette 3748770 283 55-62 1.72/1.50 Dual Quad FI & 4-brl Corvette 3748772 283 57-62 1.72/1.50 Dual Quad FI & 4-brl Corvette 3755537 283 57-62 1.72/1.50 3755538 283 59 1.72/1.50 250-290HP FI Corvette 3755539 283 58-62 1.72/1.50 3755549 283 57-62 1.72/1.50 3755550 283 57-62 1.72/1.50 Dual Quad FI & 4-brl Corvette 3755585 327 62-67 1.72/1.50 3755896 283 62-64 1.72/1.50 3760116 283 59 1.72/1.50 Dual Quad FI & 4-brl Corvette 376445 350 80-84 1.72/1.50 376450 262/305 75-76 1.72/1.50 376495 350 Jun-79 1.94/1.50 76cc 3767460 265/283/327 55-67 1.72/1.50 Car & Truck Corvette 3767462 327 62-67 1.72/1.50 3767465 283 60-61 1.72/1.50 Dual Quad FI & 4-brl Corvette 3767754 283 60-61 1.72/1.50 3767792 283 60-67 1.72/1.50 3770126 327/350 67-70 1.94/1.50 3773012 265 55 1.72/1.50 3774634 327 64-67 1.72/1.50 3774682 283/327 60-67 1.72/1.50 3774684 283/327 57-67 1.72/1.50 3774690 283 58 1.72/1.50 FI Corvette 3774692 283 58-64 1.72/1.50 Dual Quad FI & 4-brl Corvette 3782461 302/327/350 61-70 1.94/1.50 Dual Quad FI & 4-brl Corvette 2.02/1.60 Doubble humps 64cc 3782462 327 67 1.94/1.50 Corvette 2.02/1.60 3792563 327 65-67 3795896 283/307/327 58-72 1.72/1.50 60cc 3796896 283 64-67 1.72/1.50 60cc Chevy II 3798996 327 63-67 3814462 350 67 1.94/1.50 3814480 283/327 60-67 1.72/1.50 3814482 327 62-67 1.72/1.50 3817680 283 59 1.72/1.50 FI 4-brl 3817681 327 62-67 1.72/1.50 3817682 283 61-62 1.72/1.50 3836839 265 55 1.72/1.50 3836842 283/327 57-67 1.72/1.50 3836924 283 63-64 1.72/1.50 3836942 283 58-62 1.72/1.50 3837063 283 58-62 1.72/1.50 3837064 265/283 56-62 1.72/1.50 3837065 265 55-56 1.72/1.50 3837775 283/327 62-67 1.72/1.50 383882 400 71-73 3848720 283 57-58 1.72/1.50 3849820 327 65 1.72/1.50 3854520 283/327 62-67 1.72/1.50 3867802 283 57-60 1.72/1.50 FI Corvette 3873064 265 56-57 1.72/1.50 3876487 350 71-73 1.94/1.50 76cc 3876775 283/327 57-67 1.72/1.50 76cc 3878775 327 64-67 1.72/1.50 3884520 283/327 60-67 1.72/1.50 60cc 3890462 302/327/350 62-68 1.94/1.50 2.02/1.60 64cc Doubble humps 3891462 302/327/350 62-67 1.94/1.50 2.02/1.60 64cc 3891492 327 64-67 1.94/1.50 3911011 327 68 3911032 307/327 68-70 1.72/1.50 70cc 3912264 283 58-62 1.72/1.50 3912265 283 63-64 1.72/1.50 3912291 302/327/350 68-70 1.94/1.50 2.02/1.60 64ccDoubble humps 3912311 350 67 1.94/1.50 3912313 327 65-73 1.72/1.50 3917264 302 67 2.02/1.60 64cc Z-28 3917290 327 68-70 1.72/1.50 3917291 302/327/350 62-69 1.94/1.50 2.02/1.60 64cc Doubble humps 3917292 327 67-68 1.94/1.50 3917293 307/327 68-69 1.72/1.50 76cc 3921175 327 66 1.94/1.50 3923441 350 67-76 1.94/1.50 76cc 3927185 307/327/350 68-79 1.72/1.50 70cc 3927186 302/327/350 68-72 1.94/1.50 2.02/1.60 64cc Doubble humps Bolt holes 3927187 302/350 69-70 2.02/1.60 64cc Corvette 3927188 307/327/350 69 1.72/1.50 76cc 3928454 307 68 1.72/1.50 3928455 302/327 68 2.02/1.60 64cc 325 & 350HP 3928494 327 68 2.02/1.60 64cc 350HP 4-brl 3928495 327 68 1.72/1.50 3931633 307 68-73 1.72/1.50 3931635 350 68-76 1.94/1.50 76cc 3931637 327 68-69 3931638 327 68 1.72/1.50 3931639 302 68 2.02/1.60 64cc 3932441 327/350 67-79 1.94/1.50 76cc 3932454 307/350 68-799 1.72/1.50 76cc 3933148 350 68-73 76cc 3941174 327 68 1.72/1.50 3946812 350 69 1.72/1.50 3946813 350 69-79 76cc 3947014 350 68-70 3947040 302/327/350 68-70 1.94/1.50 2.02/1.60 64cc 3947041 302/327/350 68-79 1.94/1.50 2.02/1.60 64cc 3951598 400 70-71 1.94/1.50 76cc 3961598 400 70-76 1.94/1.50 76cc 3964286 350 68-77 1.94/1.50 76cc 3970126 327/350 67-79 1.72/1.50 3973195 400 71-73 1.94/1.50 76cc 3973414 327/350 64-70 2.02/1.60 64cc Z-28 LT-1 corvette 3973487 350 68-79 1.94/1.50 2.02/1.60 76cc 3973487X 350 68-73 1.94/1.50 2.02/1.60 76cc X cast 10cc's 3973493 400 70-76 1.94/1.50 76cc 3986316 350 71-72 2.02/1.60 76cc 3986330 350 69-79 1.94/1.50 76cc 3986339 307/350 68-79 1.72/1.50 76cc 3986388 350 68-79 1.72/1.50 76cc 3990941 307/350 68-82 3991492 327/350 68-73 1.94/1.50 2.02/1.60 64cc Angle plug 399380 400 70-73 76cc 3997417 307 71 1.72/1.50 3998916 350/400 72-75 2.02/1.60 76cc 3998920 350 72-75 1.94/1.50 76cc 3998991 307/350 68-79 1.72/1.50 76cc 3998993 307/350 68-79 1.71/1.50 1.94/1.50 76cc 3998997 350/400 71-73 1.94/1.50 76cc 426424 305/350/400 72-82 1.72/1.50 458624 350 69-84 1.94/1.50 76cc 460703 350 78-80 1.94/1.50 76cc 462614 305/350 77-79 1.72/1.50 462624 350 76-87 1.94/1.50 2.02/1.60 76cc Crack prone 464033 350 76-86 1.94/1.50 76cc 464036 350 76-86 1.94/1.50 76cc 468642 350/400 75-84 1.72/1.50 471513 267 79-81 1.72/1.50 472424 305 76-79 1.72/1.50 474213 305 78-82 1.72/1.50 474214 350 78-82 1.94/1.50 76cc 475590 400 78-82 1.94/1.50 76cc 517513 267 79-81 1.72/1.50 6259515 350 73 6260855 350 73-75 1.94/1.50 76cc 6260856 350 73-76 1.94/1.50 76cc 6272070 350 73 10045427 Pontiac/Chevy Aluminum, 91cc chamber Large Rectangle Port 10049875 Pontiac/Chevy Aluminum Small Rectangle port 10051128 454 90-94 2.19/1.88 72cc Bowtie Aluminum Rectangular port 400cc intake 10052902 427 Oval Port Open chamber 10101136 454 91-94 2.06/1.77 Open chamber Oval port 10101140 366/427 91-01 Oval Port Closed chamber 10114156 454 91-01 Oval Port Open chamber 10121033 454 78-88 2.06/1.77 Open chamber Oval port 10141279 454 96-01 Vortec 7400 100cc chambers Oval Port 10487052 366 77-90 Oval Port Open chamber 12352783 454 79-93 2.06/1.77 Open chamber Oval port 12363391 Oval Port Bowtie Aluminum Signature Series 12363401 Rectangle Port Bowtie Aluminum Signature Series 12558162 496 01 & UP Gen.VII Vortec 8100 8.1L truck 12560241 454 98-01 Vortec 7400 100cc chambers Oval Port 12562932 454/502 91-95 Oval Port truck crate motor 118cc chambers 12562934 502 00 & UP GenVI Marine 14011077 454 89-94 2.19/1.88 118cc Replacement Aluminum Rectangular port 295cc intake 14025175 454 83-93 2.06/1.77 Open chamber Oval port 14044861 454 89-94 2.19/1.88 106cc Bowtie Aluminum Rectangular port 380cc intake 14081044 454 86-90 2.06/1.77 Open chamber Oval port 14081045 454 78-87 Oval Port Open chamber 14081052 366/427/454 85-87 Oval Port Open chamber 14092359 427 86-89 2.06/1.77 Open chamber Oval port 14092360 454 85-89 2.06/1.77 Open chamber Oval port 14096188 454 87-94 2.19/1.88 118cc Replacement Rectangular port 325cc intake 14097088 502 89-date 2.19/1.88 118cc Replacement Rectangular port 325cc intake GEN V 14101398 454 86-90 2.06/1.77 Open chamber Oval port 24502585 Olds/Chevy DRCE 2 Pro Stock aluminum 330864 366/427/454 70-81 2.06/1.77 Open chamber Oval port 330865 366/427/454 70-84 2.06/1.77 Open chamber Oval port 330866 366/427 68-78 Oval Port Open chamber 330867 427 68-73 Oval Port Open chamber 336768 427 73-76 Oval Port Open chamber 336781 454 73-85 2.06/1.77 113cc Oval port 343771 366/427/454 68-85 2.06/1.77 Open chamber Oval port 343772 366/427/454 76-84 2.06/1.77 Open chamber Oval port 343783 454 75-78 2.06/1.77 Open chamber Oval port 346236 454 75-87 2.06/1.77 113cc Oval port 346238 454 75-87 2.06/1.77 113cc Oval port 352625 454 70-76 Oval Port Open chamber 353049 454 70-73 2.06/1.77 113cc Oval port 366765 427/454 73-84 2.06/1.77 Open chamber Oval port 3732791 348 58 3758379 348 59-61 3759256 348 58 3767738 348 59-61 3781147 348 60-61 High Perf 3795586 409 61 360HP 3814690 409 62-64 High Perf 3819333 348/409 62-65 3830817 409 63-65 340HP 3837731 409 63 High Perf Z-11 3852583 409 65 400HP 3856206 396 65-66 2.06/1.77 98cc Oval port 3856208 396 65 2.06/1.77 109cc Z-16/L-37 Rectangular port 3856213 366 66-70 2.06/1.77 Closed chamber Oval port 3856260 396 68 Oval Port Closed chamber 3872702 396/427 66 2.06/1.77 98cc Oval port L-34/L-35/L-36 3873858 396/427 66-67 2.06/1.77 109cc L-78/L-72 Rectangular port 3876875 427 66-70 2.06/1.77 Closed chamber Oval port 3904390 396/427 66-67 2.06/1.77 98cc Oval port L-34/L-35/L-36 3904391 396/427 65-67 2.06/1.77 107cc L-78/L-71/L-72 Rectangular port 3904392 427 67 2.19/1.88 106cc L-88/L-89 Aluminum Rectangular port 3904393 366 66-68 2.06/1.77 Closed chamber Oval port 3908952 427 67 Oval Port Open chamber 3909802 396/427 66-67 2.06/1.77 100cc Oval port L-34/L-35/L-36/L-68 3917215 396/427 67-69 2.06/1.77 100cc Oval port L-34/L-35 3917219 366/427 66-70 2.06/1.77 Closed chamber Oval port 3919840 396/427 67-69 2.06/1.77 107cc L-78/L-71/L-72 Rectangular port 3919842 396/427 68-69 2.19/1.88 106cc L-88/L-89 Aluminum Rectangular port 3931063 396/427 69-70 2.06/1.77 100cc Oval port L-34/L-35 3933148 366/396/427 69 2.06/1.77 122cc Oval port 3933149 427 69-70 2.06/1.77 122cc Oval port 3935401 427 68-76 Oval Port Open chamber 3946074 396/454 69-71 2.19/1.88 118cc L-88/ZL-1 Aluminum Rectangular port 3964280 427/454 66-70 2.06/1.77 Closed chamber Oval port 3964290 396/402/427/454 69-70 2.06/1.77 100cc Oval port 3964291 396/402/427/454 69-70 2.19/1.88 108cc L-78/L-71/L-72/LS-6 Rectangular port 325cc intake 3964292 454 70 2.19/1.88 109cc LS-6 Rectangular port 3965198 396 69 2.06/1.77 Open chamber Oval port 3975950 366/427 68-70 2.06/1.77 Closed chamber Oval port 3986133 366/427 70-85 2.06/1.77 Closed chamber Oval port 3986136 366/427 70-84 2.06/1.77 Closed chamber Oval port 3993820 402/454 71 2.06/1.77 113cc Oval port 3994025 454 71 2.19/1.88 118cc LS-6 Rectangular port 3994026 454 71 2.19/1.88 118cc LS-6 Rectangular port 3999241 402/454 72 2.06/1.77 113cc Oval port 473328 366 68-85 2.06/1.77 Open chamber Oval port 6258723 454 71 2.19/1.88 118cc LS-6 Rectangular port 6272292 402/454 71 2.06/1.77 Open chamber Oval port 6272990 454 71-94 2.19/1.88 118cc Replacement Rectangular port 325cc intake Use these casting numbers to identify the exhaust manifolds you have. Casting Number Years Engine Side Comments 336706 74-78 350 RH 336707 74-78 350 LH 336708 74-78 350 RH 336709 74-78 350 RH Camaro & Z-28 with A.I.R. 336710 74-78 307, 350 & 400 LH Chevelle, Camaro, Z-28, Nova and Passenger with A.I.R. 346222 74-80 307, 350 & 400 RH Chevelle, Camaro, Nova and Passenger with A.I.R. 346247 75-77 262, 350 & 400 LH Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP 346248 75-77 262, 350 & 400 RH Chevelle, Camaro, Monte Carlo and Passenger 110, 145, 155 & 175 HP 354432 75-76 262 RH 110 HP 354433 75-76 262 LH 110 HP 364753 76-80 307, 350 & 400 LH Camaro, Monte Carlo, Malibu and Passenger 372243 74-83 307, 350 & 400 RH Corvette and Replacement manifold 462697 77-79 267 & 305 LH Monte Carlo and Malibu 462698 77-83 267 & 305 RH Monte Carlo and Malibu 474008 78-82 267, 305 & 350 RH 745994 80-86 267 & 305 LH 3704791 55-56 265 LH Corvette and Passenger 195 HP 3704792 55-56 265 RH Corvette and Passenger 195 HP 3725563 56 265 LH & RH Corvette and Passenger 210 HP 2-Bolt Flange 3731557 56 265 LH Corvette and Passenger 225 HP 3731558 56 265 RH Corvette and Passenger 225 HP 3732498 58 283 RH Corvette FI 3733975 57 283 LH Corvette and Passenger 220, 245, 250, 270 & 283 HP 3733976 57 283 RH Corvette and Passenger 220, 245, 250, 270 & 283 HP 3737902 62-65 327 RH 300, 340, 360, 365 & 375 HP 2.5" Outlet 3746563 65 327 LH 300 HP 3747038 58-65 283 & 327 RH Corvette and Passenger 220, 250 & 300 HP 1.9" Outlet 3747042 58-68 283, 307 & 327 RH Corvette and Passenger 195, 200, 220, 250, 270, 275, 290, 300 & 350 HP 1.9" Outlet 3747938 64 327 LH & RH 250 & 300 HP 3747942 65 327 LH & RH 250, 350 & 365 HP 3749965 58-63 283 & 327 LH Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP 3750556 58-65 283 & 327 RH Corvette and Passenger 230, 245, 250, 270, 275, 290, 300 & 315 HP 3780728 64-67 327 LH Chevy II 3790729 64-67 283 & 327 LH 195, 220, 250, 270, 275, 300 & 350 HP 2.0" Outlet Chevy II 3790730 64-65 283 & 327 RH 220, 250 & 300 HP 1.9" Outlet Chevy II 3791162 65-66 283 & 327 RH Chevy II with AC 3791182 66-67 283 & 327 RH Passenger with AC 3797901 62-63 327 LH Corvette 300, 340 & 360 HP 3797902 62-65 327 RH Corvette 300, 340, 360, 365 & 375 HP 2.5" Outlet 3797942 63-65 327 LH & RH Corvette 300, 360, 365 & 375 HP 2.5" Outlet 3834947 64-68 283, 307 & 327 LH Chevelle 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 2.0" Outlet 3836968 55-56 265 RH Corvette and Passenger 195 HP 3837069 55 265 LH Corvette and Passenger 195 HP 3840715 64 283 & 327 LH Chevelle 3840912 64-68 283, 307, 327 & 350 RH Chevelle, Camaro and Nova 195, 200, 210, 220, 250, 275, 295, 300, 325, 350 & 365 HP 1.9" Outlet 3846559 64-71 327 & 350 LH Corvette 250, 270, 300 & 350 HP 2.0" Outlet 3846563 64-65 327 LH Corvette 300, 350 & 365 HP 2.5" Outlet 3846659 66 327 LH 350 HP 3849288 64-67 283 & 327 RH 195, 220, 275 & 350 HP 1.9" Outlet Chevy II 3849290 64-67 283 & 327 RH 195, 220, 275 & 350 HP 1.9" Outlet Chevy II with AC 3855163 65-68 283, 307 & 327 LH Passenger and Truck 195, 200, 220, 250 & 275 HP 2.0" Outlet 3872723 66-67 283 & 327 LH 195, 220, 275 & 350 HP 2.0" Outlet Chevy II A.I.R. 3872729 66 283 & 327 LH Chevelle 195,220, 275 & 350 HP 2.0" Outlet A.I.R. 3872730 66-68 283, 302, 307 & 327 RH Chevelle, Camaro & Z-28 200, 210, 220, 250, 275, 290, 325 & 350 HP 1.9" Outlet A.I.R. 3872738 66-67 283 & 327 RH 195, 220, 275 & 350 HP 1.9" Outlet Chevy II 3872741 66-68 283, 307 & 327 LH Passenger 195, 200, 220, 250 & 275 HP 2.0" Outlet A.I.R. 3872765 67-71 327 & 350 LH Corvette 300, 330, 350 & 370 HP 2.0" Outlet A.I.R. 3872778 66-68 283, 307 & 327 RH Corvette, Passenger and Truck 195, 200, 250, 275, 300 & 350 HP 1.9" Outlet A.I.R. 3887186 66 283 RH 220 HP 1.9" Outlet 3890424 64-67 283 & 327 RH Chevy II 3892679 66-68 283, 302, 307, 327 & 350 LH Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet 3892683 66-68 283, 302, 307, 327 & 350 LH Chevelle, Camaro and Z-28 195, 200, 210, 220, 250, 275, 290, 295 & 325 HP 2.0" Outlet 3893604 66-68 283 & 327 RH Passenger A.I.R. 3893608 67-68 283, 302, 307, 327 & 350 RH Chevelle, Camaro and Z-28 195, 200, 210, 250, 275, 290, 295 & 325 HP 1.9" Outlet 3896956 67-68 283 & 327 RH Truck 3905364 69-72 307, 350 & 400 RH Truck 3932376 69-70 307, 327, 350 & 400 RH Chevelle and Camaro 200, 210, 250, 255, 265 & 300 HP 1.9" Outlet 3932461 69-74 327 & 350 LH & RH Corvette 190, 195, 200, 235, 255, 300, 330 & 350 HP 1.9" Outlet A.I.R. 3932465 69-70 327, 350 & 400 RH Passenger 235, 250, 255, 265, 300 & 350 HP 1.9" Outlet 3932469 69-70 327 & 350 LH Passenger 235, 250, 255 & 300 HP 2.0" Outlet 3932473 69-70 327, 350 & 400 LH Passenger 235, 250, 255, 265 & 300 HP 2.0" Outlet 3932481 69 350 RH Corvette 3940972 67 350 RH Camaro 295 HP 3942527 69-70 302, 307, 327 & 350 LH Chevelle, Camaro, Z-28 and Nova 200, 210, 250, 255, 290, 300 & 360 HP 2.0" Outlet A.I.R. 3942529 69-70 302, 307, 327, 350 & 400 LH Chevelle, Camaro and Nova 200, 210, 250, 255, 290 & 300 HP 2.0" Outlet 3946826 69-70 302, 307, 327 & 350 RH Chevelle, Camaro, Z-28 and Nova200, 210, 250, 255, 290, 300 & 360 HP 1.9" Outlet A.I.R. 3959562 72-74 307, 350 & 400 RH Chevelle, Camaro and Z-28 115, 130, 145, 150, 160, 165, 170, 175, 180, 185 & 245 HP 2.0" Outlet A.I.R. 3973432 70-74 307, 350 & 400 RH Chevelle, Camaro, Nova and Passenger 115, 130, 150, 165, 170, 175, 180, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet 3986330 69-73 302, 307, 327 & 350 RH Camaro and Z-28 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 1.9" Outlet A.I.R. 3989036 71-75 350 LH & RH Corvette and Passenger 165, 195, 200, 205 & 270 HP 2.0" Outlet with and without A.I.R. 3989041 69-74 302, 307, 327, 350 & 400 LH Camaro, Z-28 and Nova 115, 130, 145, 150, 160, 165, 170, 180, 185, 200, 210, 245, 250, 255, 290, 300, 330 & 360 HP 2.0" Outlet with and without A.I.R. 3989043 70-73 307, 350 & 400 LH Chevelle, Camaro, Nova and Passenger 105, 115, 130, 145, 150, 165, 175, 185, 200, 245, 250, 255, 270 & 300 HP 2.0" Outlet with and without A.I.R. 3989055 69-72 307, 350 & 400 LH 3997742 71-78 307 & 350 RH 2.0" Outlet 3998902 72-78 307 & 350 RH 10045315 88-94 305 & 350 LH 10045317 88-94 305 & 350 LH 10045317 88-94 305 & 350 LH 10046123 87-92 305 & 350 LH 10046139 84-85 350 LH 10046140 84-85 350 RH 10055734 87-91 350 RH 10092901 89-91 350 LH 10092903 89-94 350 LH 10092905 89-94 350 LH 10108437 87-93 305 & 350 RH 10128448 91-93 305 & 350 LH 10128483 91-93 305 & 350 LH 10166144 91-94 350 RH 10166145 87-90 305 & 350 LH 10166147 89-94 305 & 350 LH 10166158 89-94 305 & 350 RH 10168494 94 265 & 350 LH 10207656 93-94 350 LH 10207657 93 350 RH 10433037 82-86 305 LH 12550621 94 265 RH 12550622 91 350 RH 14007400 80-86 267 & 305 LH 14014437 80-84 305 LH 14014438 80-84 305 RH 14014459 81-86 305 & 350 LH 14014500 79-86 267, 305 & 350 RH 14022625 80-81 305 LH 14031361 82-86 305 RH 14031376 81-86 350 RH 14034069 81-86 350 RH 14034075 81-86 305 & 350 LH 14043373 82-86 305 LH 14050233 83-86 305 & 350 LH 14050282 83-87 305 & 350 RH 14050287 82-86 305 LH 14057029 84-85 350 LH 14057030 84-85 350 RH 14060630 81-86 350 RH 14060633 81-86 305 & 350 LH 14067365 77-86 267, 305, 350 & 400 LH 14068667 85-88 350 LH 14068670 85-88 350 RH 14071200 83-86 305 RH 14075611 83-86 305 LH 14079295 85-86 305 & 350 LH 14079296 85-86 305 & 350 RH 14087511 86-91 350 LH 14087512 86-91 350 RH 14093653 87-90 305 & 350 LH 14093654 87-90 305 & 350 RH 14093655 87-90 305 & 350 LH 14093658 88-94 305 & 350 RH 14093660 87-90 305 & 350 RH 14093682 87-90 305 & 350 RH 14094045 87-90 305 & 350 LH 14094063 87-92 305 & 350 LH 14094064 87-92 305 & 350 RH 14094065 85-88 350 RH 14101054 87-88 305 & 350 RH 14102016 88-94 305 & 350 RH 14102018 89-94 305 & 350 RH 14103206 87-91 305 & 350 RH 14103207 87-91 305 & 350 LH 329225 73-76 454 LH Chevelle and Passenger with and without A.I.R. 353028 73-76 454 LH Chevelle and Passenger with and without A.I.R. 353030 73-76 454 LH Police 3732793 58-61 348 LH Passenger 3732794 58-61 348 RH Passenger 3767583 59-61 348 & 409 LH Passenger 3767584 59-61 348 & 409 RH Passenger 3814682 62-64 409 RH Passenger 3814683 62-64 409 LH Passenger 3822925 62-64 409 LH Passenger & Z-11 3822926 62-64 409 RH Passenger & Z-11 3855161 65 409 LH Passenger 340 & 400 HP 3855162 65 409 RH Passenger 340 & 400 HP 3856297 65 396 LH 325 HP 3856301 65 396 LH 425 HP Corvette 3856302 65 396 RH 425 HP Corvette 3856306 65 396 RH Passenger 325 HP 3857297 65 396 LH Passenger 325 HP 3868874 65-66 396 RH Chevelle 325, 360 & 375 HP Z-16 3869925 65 396 LH Chevelle 375 HP Z-16 3872770 66 396 RH 3880827 66-69 427 & 454 LH Corvette 3880828 66-72 427 & 454 RH Corvette 270, 365, 390 & 425 HP with and without A.I.R. LS-5 & LS-6 3880869 70-72 454 LH Corvette 365 & 425 HP with and without A.I.R. LS-5 & LS-6 3883827 66 427 LH Passenger 3883828 66 427 RH Passenger 3883999 66 396 LH Chevelle 325, 360 & 375 HP 3884504 66-67 396 & 427 RH Passenger 325, 385 & 390 HP 3892307 66-67 396 & 427 LH Passenger 325 & 390 HP 3902401 67 396 LH Chevelle 3904399 66 396 LH 3909879 67-70 396, 427 & 454 LH Chevelle, Camaro and Nova 325, 350, 375, 425, 430 & 450 HP LS-6 COPO 3909880 67 396 RH Chevelle and Camaro 325, 350 & 375 HP 3914613 68-70 396 & 427 LH Passenger 265, 325, 335, 345, 390 & 425 HP 3916178 68-70 396, 427 & 454 RH Chevelle, Camaro, Nova and Passenger 325, 350, 375, 425, 430 & 450 HP COPO LS-5 & LS-6 3969869 70-74 454 LH Corvette 270, 365 & 390 HP with and without A.I.R. LS-5 3989310 71-72 402 & 454 RH Chevelle, Camaro, Monte Carlo and Passenger 3989343 71-72 402 & 454 LH Chevelle, Camaro, Monte Carlo and Passenger 3994045 73-75 454 LH Police Chevy Intake Manifolds Use these numbers to identify your stock Chevy intake. Casting Number CID Years Type Comments 10051103 350 1990 4-Brl Aluminum Bowtie Single plane 10066013 350 87-89 TPI Corvette Base MASS air 9th injector style Aluminum heads (86 and older) 10077151 305/350 90-92 TPI Plenum Speed density type 10086016 305/350 90-92 TPI Base Speed density type (87 & UP intake bolt pattern) 10108630 350 92-97 MFI LT-1 12550631 350 96 MFI LT-4 Power coated red 12552138 265 93-96 MFI L-99 (lt-1 style 4.3L V-8) 14007374 305 79-82 2-Brl Aluminum 14014432 350 1981 4-Brl Aluminum Quadrajet Z-28 14057053 305/350 80-88 4-Brl Aluminum Quadrajet 14081006 350 87-89 TPI Corvette Plenum MASS air 9th injector style 14096242 350 1990 4-Brl Holley High rise Bowtie 340261 350/400 74-76 4-Brl Quadrajet 340266 305/350/400 73-82 2-Brl 340281 305/350 82-85 4-Brl Quadrajet 346249 305/350/400 75-77 4-Brl Quadrajet 346250 305/350 76-82 4-Brl Quadrajet 346260 267/305/350 73-77 2-Brl 355943 262 1975 2-Brl 3704790 265 1955 2-Brl 3711348 265 1955 4-Brl WCFB 3728725 265 1956 Dual Quad Aluminum 3731394 283 56-57 Dual Quad Aluminum 3731398 283 1957 4-Brl WCFB 3732690 265/283 56-57 2-Brl 3732880 265/283 56-57 2-Brl 3735444 265 1956 2-Brl 3735448 265 1956 4-Brl WCFB 373598 305 78-81 2-Brl Aluminum 3737109 265 1956 4-Brl WCFB 3739653 283 58-61 Dual Quad Aluminum 3741193 283 1957 Fuel Injection Aluminum 3746826 265/283 56-63 2-Brl 3746829 283/327 58-64 4-Brl WCFB 3753809 283 59-62 2-Brl 3783244 327 62-63 4-Brl WCFB 3794129 327 1963 4-Brl Aluminum 3795397 327 1962 4-Brl Aluminum 3799349 327 62-64 4-Brl Carter AFB 3826810 327 63-65 Fuel Injection Aluminum 3837109 265/283 56-57 4-Brl WCFB 3840905 283 64-65 2-Brl 3844457 283/327 64-65 4-Brl WCFB 3844459 327 63-65 4-Brl Carter AFB 3844461 327 64-65 4-Brl Aluminum 3866922 283/327 62-65 4-Brl WCFB 3872783 283/327 66-67 4-Brl Holley 3872788 238/327 66-67 4-Brl Holley 3875954 327 1966 4-Brl Carter AFB 3877652 283/327 65-67 2-Brl 3882858 283 1966 4-Brl Carter AFB 3890490 327 66-67 4-Brl Aluminum 3905393 327/350 1967 4-Brl Quadrajet 3910601 327 67-68 2-Brl 3916313 307/327/350/400 69-70 2-Brl 3917610 302 67-68 4-Brl Aluminum 3919801 307/327 1968 2-Brl 3919803 327/350 67-68 4-Brl Quadrajet 3927183 307/327 69-70 2-Brl 3927184 350 1969 4-Brl Quadrajet 3932472 302/350 69-70 4-Brl Aluminum 3941126 302 68-69 Cross Ram Aluminum base 3941130 302 68-69 Cross Ram Aluminum top plate 3958622 307/327 69-70 2-Brl 3958626 350 69-70 2-Brl 3959594 350 71-72 4-Brl Aluminum 3965577 350 1970 4-Brl Quadrajet 3972110 350 1970 4-Brl Aluminum 3972114 350 70-72 4-Brl Aluminum 3972116 350 1970 4-Brl Aluminum Service replacement part 3972361 350 1971 4-Brl Aluminum 3973465 307 69-71 2-Brl 3973467 350/400 1971 2-Brl 3973469 350 1971 4-Brl Quadrajet 3987361 350 69-70 4-Brl Quadrajet 3990948 350 1971 2-Brl 3991004 350 1973 4-Brl Quadrajet 3991005 307 1971 2-Brl 3997770 350 1973 4-Brl Quadrajet 3997771 350 1973 4-Brl Quadrajet 3997772 350 1973 2-Brl 3997773 350/400 1973 2-Brl 458520 305/350 77-82 4-Brl Quadrajet 458520 305/350 82-87 4-Brl Aluminum 6262928 307 1972 2-Brl 6262930 350 1972 4-Brl Quadrajet 6262936 307 1972 2-Brl 6263751 350 1972 4-Brl Quadrajet 6263752 350/400 1972 2-Brl 626932 350 71-72 4-Brl Quadrajet 6271060 307 1973 2-Brl 6271061 307 1973 2-Brl 7014360 283 1957 Rochester FI 7014520 283 1957 Rochester FI 7014800 283 57-58 Rochester FI 7014800R 283 1985 Rochester FI 7014900 283 1958 Rochester FI 7014900R 283 1958-59 Rochester FI 7014960 283 1958 Rochester FI 7017200 283 59-61 Rochester FI 7017250 283 59-61 Rochester FI 7017300 283 59-60 Rochester FI 7017300R 283 1959 Rochester FI 7017310 283 60-61 Rochester FI 7017320 283 1960 Rochester FI 7017355 327 1962 Rochester FI 7017360 327 1962 Rochester FI 7017375 327 1963 Rochester FI 7017375R 327 1964 Rochester FI 7017380 327 64-65 Rochester FI 336789 454 74 Q-jet Oval port 346242 454 75 Q-jet Oval port 353015 454 73 Q-jet Oval port 3732757 348 58-62 4-Brl 3749948 348 58-61 Three duce 3753748 348 60-61 Dual quad Aluminum 3760436 348 58-59 4-Brl 3767579 348/409 61 4-Brl 3770084 348 58-59 4-Brl 3772265 348 60-61 4-Brl 3780540 348 58-59 4-Brl Aluminum 3797775 348 59-60 4-Brl 3797776 409 61 4-Brl 3813678 409 62-63 4-Brl 3814881 409 62-64 Dual quad Aluminum 3830623 409 63 Dual quad Aluminum Z-11 3830831 409 63 4-Brl 340HP 3844463 409 64-65 4-Brl 400HP 3844464 409 64-65 4-Brl 340HP 3844472 348/409 62-65 4-Brl 3856289 396 65-66 Q-jet Oval port L-35 3866948 396/427 66-67 Holley Oval port L-34/L-35 3866963 396 65 Holley Rectangular port Aluminum L-37 3883984 396/427 66-68 Q-jet Oval port L-35/L-36 3885069 396/427 66-68 Holley Rectangular port Aluminum L-78/L-72 3886093 427 67 Holley Rectangular port Aluminum L-88 3894374 427 67 Three duce Rectangular port Aluminum L-71 3894382 427 67 Three duce Oval port Aluminum L-68 3919849 427 68 Q-jet Oval port Aluminum L-36 3919850 427 68 Three duce Oval port Aluminum L-68 3919852 427 68 Three duce Rectangular port Aluminum L-71 3919878 396/427 68 Holley Rectangular port Aluminum L-78/L-72 3931067 396/427 69 Q-jet Oval port L-35/L-36 3933163 396/427 68-69 Holley Rectangular port Aluminum L-78/L-89 COPO 3933198 427 68-69 Holley Rectangular port Aluminum L-88/ZL-1 3937793 427 68 Q-jet Oval port Aluminum L-36 3937795 427 69 Three duce Oval port Aluminum L-68 3937797 427 69 Three duce Rectangular port Aluminum L-71 393841 454 73-75 Q-jet Oval port 3947801 427 69 Q-jet Oval port Aluminum L-36 3952900 396 69 2-Brl Oval port 3955287 402/454 70-71 Q-jet Oval port LS-3/LS-5 3963569 396/402/454 70-71 Holley Rectangular port Aluminum Low rise L-78/L-89/LS-6 3967474 454 71 Holley Rectangular port Aluminum 6263753 402/454 72 Q-jet Oval port LS-3/LS-5 6269318 454 72 Holley Rectangular port Aluminum