LA 318 advice

“If” the OP’s block is in the 9.599” range, to have the pistons down the hole .100-ish, they’d have to have a CH in the 1.720” range.

When he pulls one out, there should be a way to ID what they are.
As I mentioned, mine are .095-.105, checked 4 corner pistons. Lead me to know the pistons have the .020 lower CH.