deciding on a intake for a sbm weiand stealth or air gap

No mater the intake up top, well tuned and a proper combo go far. Not to be rude but I think the thinking is flawed. I point to the F.A.S.T class with a stock intake running mad times as an example.

Camshaft scan handle the restrictive exhaust manifold issue followed by exhaust pipe size. The intakes ability for ingesting is all it does and it doesn't worry about how the engine breaths out.