Slant 6 Aluminum Performance Head

There are some folks who really want to go as fast as possible with NA. Not the easiest way, but maybe the purest, for what that is worth. Lots of opinions, not many options, nothing cheap. If a billet crank was $3K years ago, what would an aluminum head cost, $5K? And such a small market. Can't get a roller cam, have to fabricate a lot of parts for the oiling system. I know I am rambling, but you can see why Hellcrate swaps are so popular.