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Chevy Block Casting Number - Big Blocks

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Chevy Block Casting Number
Big Blocks
348-409
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Chevy Big Block Casting Numbers and Data

There is a lot of misinformation on the internet about these numbers. We have taken the time to verify the data as much as possible. There still may be errors. Please lets us know if you find one.

Tall Deck = 10.2" Height.
1991 and later Gen.V - VII Engines have 1 piece seals.

Big Blocks

Number C.I.D. M-Blts Year HP Description
326711 4 Alum., CanAm, 4.44" Bore, Steel Liners
340220 427 4 68-85 Tall Deck, Truck
345014 454 70-86 Truck
346236 454 2 75-76
359070 454 70-90 Truck
361959 454 2 or 4 73-90 Passenger
361959 454 75-85 Truck LD
364776 427 4 68-85 Tall Deck, Truck HD
364779 366 4 68-90 Tall Deck, Truck HD
399204 509 4 70-71 Alum., CanAm, 4.5" Bore, Steel Liners
399293 366 4 77-78 Tall Deck
473478 427 4 77-90 Tall Deck, Truck HD
495102 4 Alum. CanAm, 4.5" Bore
3732811 348 58 Passenger
3751872 348 58 Passenger
3755011 348 59-61 Passenger
3771705 348 59-61 Truck, Replacement
3782870 427 4 68-76 Tall Deck, Truck
3788068 409 62 Passenger
3795623 409 61 Passenger
3798962 348 62-65 Truck, Replacement, X on side
3824553 366 4 66-67 Tall Deck
3830814 409 63 Passenger, X on side
3844422 409 64 Passenger, X on side
3855961 396 2 or 4 65-66 325 Passenger
3855961 427 2 or 4 66 390-425 Vett
3855961 396 2 or 4 66 325-375 Chevelle
3855961 396 2 or 4 68-69 Truck LD
3855962 396 2 or 4 65-66
3855962 396 2 68-69 Passenger, Chevelle
3855977 366 4 66-73 Tall Deck
3857655 348 62-65 Truck
3857656 409 65 Passenger
3869942 427 2 or 4 66-67 390-425 Passenger, Vett
3873858 396 66
3902406 396 2 or 4 67 Chevelle
3902466 396 66-69 Passenger, Chevelle, Nova, Camaro
3904351 427 2 or 4 67 385-435 Passenger, Vett
3904354 366 4 66-67 Tall Deck, Truck
3916319 366 4 68-85 Tall Deck, Truck HD
3916321 427 2 or 4 68 Passenger, Vett
3916323 396 2 or 4 68 325-375 Passenger, Camaro, Chevelle, Nova
3925521 427 4 68-85 Tall Deck, Truck HD
3935439 427 2 or 4 68-69 430-435 Vett
3935440 396 2 or 4 68-69 Passenger, Chevelle, Camaro, Nova
3937724 366 4 68-85 Tall Deck, Truck HD
3937726 427 4 68-84 Tall Deck, Truck HD
3946052 427 4 69 Alum., ZL-1, Mark IV
3946053 427 4 97+ Alum., ZL-1, 2nd Version, Mark IV
3955270 427 2 or 4 69 390-435 Vett
3955270 427 2 or 4 69 385-425 Passenger
3955272 402 2 or 4 69
3955272 396 2 or 4 69 Passenger, Chevelle, Camaro, Nova, Truck LD
3955272 396 2 or 4 70-72 Truck LD
3955274 366 4 68-85 Tall Deck, Truck HD
3955276 427 4 68-73 Tall Deck, Truck HD
3963512 427 2 or 4 68-69 385-425 Passenger, Chevelle, Camaro, Vett
3963512 454 2 or 4 70-71 360-390 Passenger, Vett
3963512 454 2 or 4 70 450 Chevelle LS6
3963512 454 2 or 4 70-76 Passenger, Chevelle, Monte Carlo
3963512 454 2 or 4 71 365-425 Vett
3963513 454 73-76 Passenger, Chevelle
3968854 396 68-69 Truck, Passenger, Chevelle, Nova, Camaro
3968854 402 70-72 Truck, Passenger, Chevelle, Nova, Camaro
3969851 366 68-85 Truck HD
3969852 366 4 68-84 Tall Deck, Truck HD
3969854 396 2 or 4 69-72
3969854 402 2 or 4 70-72 Truck, Passenger, Chevelle, Nova, Camaro
3969854 454 69-72
3969858 427 4 68-84 Tall Deck, Truck HD
3995623 409 61 Passenger
3999289 454 2 or 4 71-79 Passenger, Vett, Chevelle, Truck
3999290 396 2 or 4 68-69 Truck LD
3999290 402 2 or 4 70-72 Truck LD, Passenger, Chevelle, Nova, Camaro
3999290 402 2 or 4 72 Passenger, Chevelle, Camaro, Nova
3999293 366 4 68-85 Tall Deck, Truck HD
3999293 454 73-75 Passenger, Chevelle
3999294 427 4 68-84 Tall Deck, Truck HD
6272177 402 70-73
10051107 454 4 Bowtie, Mark IV, 9.8" Deck, Siamesed Bore
10069282 366 4 90-91 Tall Deck, Mark IV
10069284 427 4 Tall Deck, Mark IV
10069286 454 4 90-91 Mark IV
10114182 454 4 91-95 Gen.V
10114183 366 4 91+ Tall Deck, Gen.V
10114184 427 4 91-92 Tall Deck, Gen.V
10134366 454 4 Bowtie, Tall Deck, Gen.V
10185050 454 4 Bowtie, Gen.V
10237297 454 4 96+ Vortec, L-29, Gen.VI
10237299 427 4 96+ Tall Deck, Gen.VI, 7.0L, Truck
10237300 502 4 96+ Gen.VI, 4.466" Bore
12550312 427 4 96+ Tall Deck, Gen.VI, 4.25" Bore, Fuel Pump Boss, Clutch Linkage Boss
12550313 454 4 91+ Gen.V Crate Motor, Gen.VI 4.25" Bare Block, Fuel Pump Boss
12556110 496 4 01+ Gen.VII 8.1L, Vortec 8100, Truck
12561357 454 4 96+ Gen.VI
12561358 502 4 Gen.VI
14015443 454 2 or 4 87-90 Mark IV, Truck, Motorhome
14015445 454 2 or 4 78-90 Truck LD
14044807 454 4 Tall Deck, Bow Tie, Mark IV, 4.25" or 4.495 Bore
14096859 502 4 Gen.V, HO
24502504 454 4 Bowtie, Gen.V, Race Prep.
24502506 454 4 Tall Deck, Bowtie, Gen.V, Race Prep.
24502572 4 4.5 bore, Olds DRCE 2
25534402 4 4.59" Bore, Olds DRCE 3


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