nm9stheham said

As above, I would have a skim mill on each head, or at least have them checked for flatness. who knows how warped they may be. BTW, if you use the Felpro 1008's rather than the standard Felpro 8553PT kit gaskets, you will gain almost 0.3 point in compression ratio. You will definitely feel that in the butt dyno.

The heads are closed chamber types, right?

Click to expand...