Big Block Engine

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This page contains information on Big Blocks. For casting numbers, scroll down. To check the number of a specific big block part, click on the page in the menu bar.

Big Block Cast Iron Engine

*396*	*1965 - 69*	*4.094*	*3.76*	*2.75*	*2.20*	*2 & 4 bolt*
*402*	*1970 - 72*	*4.125*	*3.76*	*2.75*	*2.20*	*2 & 4 bolt*
*427*	*1966 - 69*	*4.250*	*3.76*	*2.75*	*2.20*	*2 & 4 bolt*
*454*	*1970 - 74*	*4.250*	*4.00*	*2.75*	*2.20*	*2 & 4 bolt*
*502 (crate)*	?	*4.447*	*4.00*	*2.75*	*2.20*	*4 bolt*

Big Block Aluminium Engine

*427*	*1969*	4.250*	*3.76*	*2.75*	*2.20*	*4 bolt*
*430*	*1969*	4.440*	*3.47*	*2.75*	*2.20*	*4 bolt*
*465*	*1970 - 71*	4.440*	*3.76*	*2.75*	*2.20*	*4 bolt*
*495*	*1970 - 71*	4.440*	*4.00*	*2.75*	*2.20*	*4 bolt*
*495*	*1972*	4.440**	*4.00*	*2.75*	*2.20*	*4 bolt*
*510*	*1972*	4.500**	*4.00*	*2.75*	*2.20*	*4 bolt*

* Cast Iron Cylinder Liners

** Without Cylinder Liners

Big Block Chevy Engine Casting Numbers

Casting #	Years made	Size	HP levels	Notes
3946052	69	427	430	4-Bolt main Aluminum ZL-1
3855961	66 - 67	396	325 & 360	2-Bolt main
3855962	65-66	396	360, 375 & 425	4-Bolt main
3869942	66-67	427	390 & 425	2 & 4-Bolt main
3873858	66	396	375	4-Bolt main
3902406	67	396	325, 350 & 375	2 & 4-Bolt main
3904351	67	427	385-435	2 & 4-Bolt main
3916321	68	427	385-435	2 & 4-Bolt main
3916323	68	396	325, 350 & 375	2 & 4-Bolt main
3935439	68-69	427	335-435	2 & 4-Bolt main
3935440	68 -69	396	265-375	2&4-Bolt main
3955270	69	427	335-435	2 & 4-Bolt main
3955272	69	396/402	265-375	2 & 4-Bolt main
3963512	69-71	427/454	335-450	2&4-Bolt main
3963513	73-76	454	215	2-Bolt main
3969854	69-72	396/402/454	240-360	2&4-Bolt main
3999289	72-78	454	215-270	2-Bolt main
3999290	72	402	240	2-Bolt main
6272177	72	402	210	2&4-Bolt main
14015445	75-87	454	210 & up	2&4-Bolt main

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Last Updated:

08/27/99 09:01 PM