[b-man]

Originally Posted by CATBIRD

Bart.....the cylinder walls of the 1959 389 also had a little extra meat. Back in the day, it wasn't unheard of to go .125" with the boring bar......John

These thick-wall blocks should be stable in a boosted application.

Built back in the days when over-engineered mechanical parts were fairly common.

[65nss4spdGTO]

Originally Posted by b-man

These thick-wall blocks should be stable in a boosted application.

Built back in the days when over-engineered mechanical parts were fairly common.

Great find Bart!

We have a few of these blocks including the original 4-bolt main version that came in my dads 59 Catalina.

I've sonic checked a number of them and they have been the thickest blocks I've tested with an easy over bore of .100"+.

I have a RAV block in the shop and the bottom is is very similar.

Good luck with it.

Calvin Hill
Hill Performance
708-250-7420