possible piston to head contact.

In my ongoing quest to win the battle against my pro comp heads, they have thrown a new curveball at me. I recently pulled them off my '72 block 340 to get new springs installed for the new Comp Cams roller cam. Upon delivering them to the machine shop my machinist pointed out that there were shiny spots around the combustion chamber where it looks like the Pistons may have contacted the heads. The same shiny spots are also on the Pistons in the same "s" shaped pattern. My piston are 30 over flat top. Before I resort to changing or modifying the pistons, I was hoping that there may be a thicker head gasket available. Has anyone else encountered this particular issue before? Also, will the pro comp roller rockers be able to withstand the higher tension spring pressure without breaking in half? I do not have the spring ratings with me at the moment, but can post them later.