Good advice- - - -and I'm not interested in, nor intimidated by insults by a newbie with 9 posts whose parents were probably filling their diapers when I built my first round track engine.
I routinely get 600+ HP on the dyno, (not some computer pipe dream) with cast iron heads. Anyone who understands the problems with sealing gasket surfaces between cast iron and aluminum due to different expansion rates will understand my opposition to aluminum heads on the street. On a round track race engine that gets run less than 1,000 miles between rebuilds, or a drag engine that only has to make it 1320 feet before it explodes, it's a different situation.
Jerry
