Better head

@slantsixdan Looser control of chamber placement? That's major: I'd love to see how they fixed that casting process or even how it became an issue as a manufacturing process student. That sounds unlike Chrysler who fitted different pistons to the same blocks to within .003 tolerances. IIRC the later heads had a better quench design for emissions too. Super early heads had no alternator bolt boss by the stat housing.