This is not directly impala content (But once I get my car done, I can start the work on my dads 94 SS). I am finishing a motor buildup for my 88 Monte SS. Its a .030 350, ported iron heads, healthy cam, etc. But I want to install thin head gaskets to bump the compression up. They are .015" vs .039". The P/N is 1094 and they are made by Felpro. The question I have is do I install these bare? Or do I put some type of sealer on them? I have gotten all different answers. Both surfaces are flat but I don't want to have leaking head gaskets right off the bat. Any help is appreciated.