slant 6 head shave

The Mopar performance book says that every .0068" cut equals 1cc. But remember that the combustion chamber is itself like a dome shape, so the further you cut the less cc's you remove. Supposedly a .090" cut (depends on what you read, some books say .100") gives 9.4:1 compression, but I suspect that needs verification.

I've also read that the rocker adjusters can handle a .100" cut or less.