Just my two cents, but it would be a whole lot easier to get some new pistons to raise the compression rather than milling the heads. To pick up a point and a half of compression from milling the heads, I'd imagine that would be a pretty substantial cut, but I'm no machinist. I'd think that you'd definitely have to have the intake machined, and then the heads and intake are married. Seems like a ton of work for stock Magnum heads.
