Best Carb/Manifold Combo for 318

performer intake, a 600 carb that you are familiar with.

next would be the action plus, I believe it has te smaller port windows as well.

and 'I read' here somewhere about even the stealth has he small window?

But I've run the performer and eddy 600 carb on a 310.020-340 cam-headers-4spd and it worked good, shut off at 61-6200rpm.