Okay, I have a 1970-1971 1231738 casting block currently at .038” over, and a set of 1973 heads. Shop says it needs to go a bit more than .040 to get the bores trued. I can get the .050” pistons from TA and I have the TA 1633 rods already. Here’s the question: after looking at Team Buick’s site, can my 1973 heads go on the earlier block if I tap and plug the core hole in the head that is left exposed, throw a gasket on on go? Would really like to stick with the heads I have for this daily driver Riviera.
Yes, as long as you plug any holes left exposed by bolting double scallop heads on a single scallop block. The real question is has the block been sonic checked for minimum cylinder wall thickness? https://www.v8buick.com/index.php?t...ck-why-sonic-checking-is-so-important.171953/