Have you looked at the new Chinese electric superchargers? I've seen some youtubes. The cheap ones are worthless and even restrict airflow, but the $500+ ones actually work. I think that is the future, and certainly simpler and more elegant than the plumbing chore of a turbocharger or mounting a giant and expensive belt-driven supercharger. I understand there are current production cars with one (M-B). As one guy here promoted (Bill Dedman I recall), the slant six is a perfect candidate for boost. The small valves with manifolds on one side don't matter if you force the air in. Ditto for a high-lift camshaft.
