If you want to run NSS and have stock intake ports, the Indy modman, edelbrock 2x4 are the cheapest bolt on manifolds. I ran a 64 crossram with at first with 906 heads ported close to maxwedge, you can't get them all the way, and then the crossram with victor Jr. heads with max wedge ports. I now run a victor intake with a fabricated 2x4 top. I run 750 AFB carbs on all those combinations. Their is a little difference in NSS rules with different groups, for example no single four combos are allowed with the Victory series NSS. So check with the group you want to run with. I would probably choose the modman intake with your combination. Some say a divider installed in the plenum picks this manifold up a little. I started on the 11.00 index now run 9.75 Lot of guys worry about getting the AFB's to run, but with a few minor modifications they run very well. I know several NSS cars in the 8's with a pair of AFB's.