Drg84 said that if I shaved the heads it would make them equal to the engine and would thus not lower compression. What exactly is shaving the heads? I would figure that means sanding or grinding the metal on the face of the heads down, but wouldn't that make them NOT equal to the intake manifold? And how would I resolve that problem? I am in need of lots of information and recommendation with this because I while the car is not running right now, I am about to throw all of my bits and pieces together and get this thing running soon.