389 Pontiac?

Paul Precht · 02-09-2013, 11:20 PM

Quote:

Originally Posted by Hudlow66

Ive gone to std. 400 bore before. Then again, I just got done boring one to .040 and ran into water in one of the cylinders. Best to have your machinist sonic test it. That way there's no suprises.

Back in the mid 70s, I was boring a Chev 350 block .020" for a SS build after a few hours of deburing and one cylinder opened up into a large air pocket. The block was scrapped.