340 Piston and Valve Question

Hello, I have a 340 .030 over and the deck was milled .010 and the pistons are now .025 above deck. Does this present a issue for piston integrity? I'm running a set of factory "0" heads with 2.02 and 1.60 valves, what would be the recommended head gasket to achieve proper clearances? Thanks in advance for any help.