Chevrolet Engine Block Numbers

Casting #	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