where`s pittsburg racer when we need him ??
I`d unshroud the valves out to the edge of the head gasket , (cyl. bore) , ''smoothly'' , mindfull of compression loss ...
Not worried about loosing a little compression. I had 195psi crank comp with a MP 380HP roller cam retarded to a 110 ICL and .057 thick head gasket. I plan on using a felpro 1008 .039" when it all goes together again.