Hey guy's I am in the process of tearing my car back down this year and while I have it apart I figured I would bump the performance up a little. My question is what would be the best suited head for my engine ? 318 X block 4 bolt mains , 422 cubic inches Eagle rods and Steel crank. Ross pistons. I am leaning toward another matched roller cam when I change things also. The engine has about 11.5 compression with my open Eddy heads now. M1 intake and a 950 HP carb. Bang for the buck which heads would get me the most performance ?