I ordered some iron pro toplines with 200cc ports but now after reading some more posts I'm worried that I went too big and should have gotten the 180s. This is my drivetrain: LT4 hot cam, 1.6:1 rockers, hypereutectic pistons, factory X rods, OE crank, sportsman II intake, holley 750 VS, ~9.4:1 CR, T56, 3.42:1 rear. This cam is supposed to be good to about 5500 rpm and I put my redline at 6000 because of the factory bottom end.