How do you figure

I am running the same kit , .030 over so 432 Stroker from 440 source

Running there Icon flat top pistons with 4cc valve reliefs and 75 cc Edelbrock heads I am at 10.4 compression with a .039 Fel Pro Gasket , pistons where around .020 in the hole after cleaning up the block decks . Yes my quench isn’t perfect but I already had the Edelbrock 75 cc heads prior to the rebuild

I can run 91-93 octane on the street no problems and currently at 36 degrees total timing

Your Stealth Heads are closer to 80 cc

You should bee around 10.1 compression or a little less because those Icon pistons are .025 down in the hole factory block

Are you at zero deck or did your machine shop just clean ?