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

Small Block Statistics:

*Engine*	*Years*	*Bore*	*Stroke*	*Main Journal*	*Rod Journal*	*Main Caps*
*262*	*1975 & 76*	*3.671*	*3.10*	*2.45*	*2.10*	*2 bolt*
*265*	*1955 & 56*	*3.750*	*3.00*	*2.30*	*2.00*	*2 bolt*
*267*	*1979 - 81*	*3.50*	*3.48*	*2.45*	*2.10*	*2 bolt*
*283*	*1957 - 67*	*3.875*	*3.00*	*2.30*	*2.00*	*2 bolt*
*302*	*1967*	*4.001*	*3.00*	*2.30*	*2.00*	*2 bolt*
*302*	*1968 - 69*	*4.001*	*3.00*	*2.45*	*2.10*	*4 bolt*
*305*	*1976 - 90*	*3.736*	*3.48*	*2.45*	*2.10*	*2 bolt*
*307*	*1968 - 73*	*3.875*	*3.25*	*2.45*	*2.10*	*2 bolt*
*327*	*1962 - 67*	*4.001*	*3.25*	*2.30*	*2.00*	*2 bolt*
*327*	*1968 - 69*	*4.001*	*3.25*	*2.45*	*2.10*	*2 bolt*
*350*	*1967 - 90*	*4.001*	*3.48*	*2.45*	*2.10*	*2 & 4 bolt*
*400*	*1970 - 72*	*4.125*	*3.75*	*2.65*	*2.10*	*4 bolt*
*400*	*1973 - 80*	*4.125*	*3.75*	*2.65*	*2.10*	*2 bolt*

Small Block Chevy Casting Numbers

Casting #	Years made	Size	HP levels used for	Notes
3970010	69 - 79	350 only	145 - 375	2&4-Bolt main caps.
3970014	68 - 79	350 only	200 & 255	2&4-Bolt main caps.
366245	78 - 82	350 only	N\A	4-Bolt main Bowtie High Tin
14011064	82 - 86	350 only	N\A	4-Bolt main Bowtie High Tin
3914678	68 - 79	350, 327 &: 302	210 - 350	2-Bolt main caps.
3858180	64 - 67	327 only	250-375	2-Bolt main caps.
3892657	64 - 67	350, 327 & 302	210-350	2-Bolt main caps.
3782870	62 - 67	327 only	250-375	2-Bolt main caps.
3789935	61 - 66	283 only	230-315	2-Bolt main caps.
3737739	57 - 629	283 only	220-290	2-Bolt main caps.
3951509	70 - 80	400 only	150-265	2&4-Bolt main caps.
3951511	70 - 80	400 only	255 & 265	2&4-Bolt main caps.
330817	70 - 80	400 only	150-180	2-Bolt main caps.
14010207 14010209	80 - 85	350 only	205 & up	2&4-Bolt main caps.
14088548 14093638 14316379	86 - 88	350 only	205 & up	2&4-Bolt main caps. 1 piece rear main seal.
10125327	92 &;amp UP	350 only	300 & up	2-Bolt main caps. 1 piece rear main seal. LT-1 blocks
14101148	88 &;amp UP	350 only	205 & up	2&4-Bolt main caps. 1 piece rear main seal. Late model roller non LT1
10051184	86 &;amp UP	350 only	N/A	4-Bolt main caps. 1 piece rear main seal.

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Last Updated:

12/16/99 01:07 AM