Aluminum Head /6

If I where going to go through the trouble of tooling up a new aluminum slant six head, I would make something like the mickey thompson three valve indy head with a small cover for rocker access and the hilborn stacks coming out of the top of the head. I agree that other than being a prototype or a lightweight head, there is going to be minimal performance gain from using it. If your going to do something, don't do something that's already been done!