Technical Info

Chevrolet Engine Block Casting Numbers

All engines are stamped with an engine ID code, consisting of assembly plant code, production date, and suffix code.

Casting Number CID Main Bolts
330817 400 2-Bolt
346236 454 2-Bolt
355909 262 2-Bolt
3703524 265 2-Bolt
3720991 265 2-Bolt
3731548 283 2-Bolt
3737739 283 2-Bolt
3751872 348 2-Bolt
3755011 348 2-Bolt
3756519 283 2-Bolt
3771705 348 2-Bolt
3782870 327 2-Bolt
3788068 409 2-Bolt
3789935 283 2-Bolt
3790721 283 or 327 2-Bolt
3791362 327 2-Bolt
3794226 283 2-Bolt
3795623 409 2-Bolt
3798962 348 2-Bolt
3830814 409 or 427 2-Bolt
3834810 283 2-Bolt
3834812 283 2-Bolt
3844422 409 2-Bolt
3849852 283 2-Bolt
3855961 396 2-Bolt
3855962 396 4-Bolt
3857656 409 2-Bolt
3858174 327 2-Bolt
3858180 327 2-Bolt
3862194 283 2-Bolt
3869942 427 2-Bolt or 4-Bolt
3892657 302 or 327 or 350 2-Bolt
3896944 283 2-Bolt
3902406 396 2-Bolt or 4-Bolt
3903352 327 2-Bolt
3904351 427 2-Bolt or 4-Bolt
3914636 307 2-Bolt
3914660 327 2-Bolt
3914678 302 or 327 or 350 2-Bolt
3916321 427 2-Bolt or 4-Bolt
3916323 396 2-Bolt or 4-Bolt
3932386 302 or 350 4-Bolt
3932388 302 or 350 4-Bolt
3935439 427 2-Bolt or 4-Bolt
3935440 396 2-Bolt or 4-Bolt
3946052 427 4-Bolt
3951509 400 2-Bolt or 4-Bolt
3951511 400 4-Bolt
3955270 427 2-Bolt or 4-Bolt
3955272 396 2-Bolt or 4-Bolt
3956618 302 or 327 or 350 2-Bolt or 4-Bolt
3956632 307 2-Bolt
3963512 427 or 454 2-Bolt or 4-Bolt
3969854 396 or 402 2-Bolt or 4-Bolt
3970010 350 2-Bolt or 4-Bolt
3970014 350 2-Bolt or 4-Bolt
3970020 307 2-Bolt
3970024 307 2-Bolt
3999289 454 2-Bolt
3999290 402 2-Bolt
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