I have looked all over for my casting number online at various websites it is not listed. I bought an engine that i was told come out of a 1996 chevy commercial size truck, I'm guessing a c-70. I was told the engine is a 454. The casting numbers on my 454 is "12550311." Can someone find this number? I'd really like to know if I have a 454 or a 427.
Chevy Big Block casting number
- Thread starter HankT
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I found this while poking around the net u may actually have a 366 ....
---12550311 --366 cubic inch, 1996-1998, VIN: P, FI, Naturally Aspirated, Gas, head castings 140 or 933, mechanical fuel pump boss
---12550312 --427 cubic inch, 1996-1998, VIN: M, FI, Naturally Aspirated, Gas, head castings 140, mechanical fuel pump boss
12550312...427T......96-up...4-bolt, Gen.VI, 4.250" bore, fuel pump boss, clutch linkage pivot boss
12550313...454.......91-up...4-bolt, Gen.V crate motor, Gen. VI 4.25" bare block, fuel
Also this website had a pile of info : https://www.tradecraftspecialties.com/bbckb
---12550311 --366 cubic inch, 1996-1998, VIN: P, FI, Naturally Aspirated, Gas, head castings 140 or 933, mechanical fuel pump boss
---12550312 --427 cubic inch, 1996-1998, VIN: M, FI, Naturally Aspirated, Gas, head castings 140, mechanical fuel pump boss
12550312...427T......96-up...4-bolt, Gen.VI, 4.250" bore, fuel pump boss, clutch linkage pivot boss
12550313...454.......91-up...4-bolt, Gen.V crate motor, Gen. VI 4.25" bare block, fuel
Also this website had a pile of info : https://www.tradecraftspecialties.com/bbckb
