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**kwmech** · 07-29-2022, 01:19 AM

The 3970010 block is a block cast for a 4'' bore--PERIOD. the only way to get a 305 out of this block is to sleeve all 8 cylinders. A 305 block has a 3.75 bore or 3.743 to be exact

07-29-2022, 01:19 AM	#28
kwmech Senior Member Join Date: Mar 2003 Location: Colfax-California Posts: 8,393	Re: 3970010… but it’s a 305?!?! The 3970010 block is a block cast for a 4'' bore--PERIOD. the only way to get a 305 out of this block is to sleeve all 8 cylinders. A 305 block has a 3.75 bore or 3.743 to be exact