bast LA 4speed intake?

Air gaps,do work.As for the origin,Smokey Yunick was playing with them in the early 60's. Read a 78 Hot Rod Smokey article,mentioned" air gap" manifold bold letters. Chevy ,benched it. Someone ,patented it,likely Smokey. As soon as that patent ran out,who did the original casting? My guess,Edelbrock.