340 build

BTW, I have high hopes for this engine! If it is all good or can be repaired Like with some new intake valves, you made quite a score, dude.

And I see you found the head specs.

And look on the bottom of heads in that flat area over the cylinder bore to look for any marks, particularly over the tallest pistons. With that head gasket and the APR studs crushing the head gaskets hard, making the piston to head space so tight, there is a small chance that a piston could have kissed a head. If so, then it is time to check that rod and bearing and piston a bit more closely.