Piston height question w/x-heads

RacerRick said
They should work fine. X heads have zero quench area, and the factory 10.5:1 compression pistons are above the deck about the same amount with the factory shim gaskets (around 0.015)which are much thinner than the common felpro replacement gaskets (around 0.038 to 0.042).

I agree. The reason they were shaved for the Edelbrocks is because the Edelbrocks were probably the closed chamber style so the positive deck pistons would not work with those heads. X-heads are open chamber and designed for the piston to stick up above deck.