I have a set of trw l2372 pistons for my .30 over 454. They are .580 dome closed chamber pistons. I am trying to find a gm steel head that would be best with these. I have a set of 215 heads which are closed chamber oval port 100.5 cc heads. From what I've been reading the closed chamber dome pistons won't work with oval port heads. ( I read it on the internet so it has to be true) So what would be a good head to look for?