were is the pistons in the deck. in the hole or O deck ? if O i would want more then 020. you could reuse the felpro 8180 if every thing is dead flat .it been done many times . your running a triple valve spring on a 8.2:1 what cam? you mean a dual spring with a damper i worry more about the right springs for your cam ??.if you going to use the MR gaskets you want to coat them with copper gasket sealer with the 030 off the heads and a 020 head gasket hows your piston to valve ? with the 030 off did you loose 6cc?