I have a 352 c.i. small chevy with a 8-71 BDS Air-Loc roots blower on E-85. It is run a BS3 EFI system. The compression is 9.25 to 1 and has AFR 227 Heads. I am making 15-16# of boost and have 2" tubes and 3.5" exhaust. I am wondering if I should have larger primaries to help flow and horsepower... What is your opinion?????