Slant Six headers and 4 barrel Intake

Yeah, them hedders like like Clifford. Anybody catch the 'Clifford' manifold. I was looking to see an Offy??? I see by the thread that this stuff has been sold. Somebody got a good deal I guess. I have seen stuff like this before and one thing puzzles me. Since there is not much gain in short hedders and they are duals and they go back into one I cant imagine much gain with this setup. My question is why go to all the trouble to have split hedders only to run single exhaust and not duals to the back?? Thats what I am gonna do with my car and I have long tube Hookers. I am in hopes of a little better power and a real nice sound too.
Chas