Intake Manifold Options 340

I have a build that is fairly similar to yours. Being a 360, it does have the bigger stroke, but it's about 10:1CR, Lunati Voodoo 268/276* .494/.513", Mild ported J heads 2.02/1.60 valves, stock iron exhaust. Originally had the Performer and a 750 DP on top. Then, I swapped to an RPM (non air gap) and it was a pretty noticable difference in midrange response. After a while with that setup, I ended up swapping the 750DP off for a 650DP and the response improved immensely with no decrease in top end pull.