360's had open chamber heads at 72cc. Not sure how you'd run a dome piston with closed chamber heads like w-2's without hitting the piston on the head, unless your pistons arn't sitting at zero deck. With kb flat tops that have a 5cc piston head volume, a .039 head gasket, zero deck, 58 cc heads, your bore and stroke, you're looking at a c/r of 12.3 range w/ iron heads. If you need higher compression than that you're looking at custom milled pistons.
