Don't trust my math skills enough to not check piston to valve clearance. If you wanted to maybe save the head gaskets, use air to remove one intake and exhaust valve spring, install weak springs and check piston to valve with dial indicator. Just roll it over while bumping the rocker arm with your finger till you find the tight spot. I prefer clay so you can check radial clearance of the valve pocket, but it sounds like that is not an issue with your engine. To tell you the truth if you have aftermarket shelf pistons, most of them have plenty deep valve pockets, BUT is it worth the damage if it is not right?