What's the compression height for a 360 magnum as buying pistons

LOL that is a lot for 9.3.....you must be running some race fuel. That is pretty amazing for the stock pistons. I have run 14-15 psi with around 8.2 SCR in a Mitsubishi 2.6L on pump premium and up to near 1.75 HP per ci, but that's at the flywheel, not the rear wheels. Good EFI helps.