While he may not recall today, I once shared this concept with Junior Johnson, after sending him an Edelbrock Victor 4X4 with hand-filed core port runners specific to one of his then-current, big-block Chevy NASCAR engines. As I recall, he complimented the manifold with a set of two-sized pipe headers and a camshaft with two sets of intake and exhaust lobes; one pair for the larger (shorter) area intake and exhaust passages and one for the intake/exhaust set of the smaller (longer) passage area. The combination was an engine that pulled hard off the corners and well past the flag stand. When I approached one of my cam grinding friends about cutting a camshaft based on a similar approach (at the time), he said it probably wouldn't work. Somebody forgot to tell Junior about that. It was a Bristol killer.