Stock 460, D1 block uncut, TRW dish pistons, if I put a set of C8's that have been milled .030 and had 2.245 intakes, 1.725 exhaust valves installed, will I have a valve to piston clearance problem from the bigger valves? Just trying to up the compression a little. They are ported heads so how much difference will they make in power? 750 Holley, performer intake. Thanks!