I've got a vortec 350, comp 08-801-8 cam, Promax heads with 185cc intake runners, 2.02 intake valves, 1.60 exhaust, wieand street warrior intake, 1.6 roller rockers, msd street fire intake, I need to know what size carb I need, I have access to a 600 and a 750 but I think the 750 will be too big and Im not sure if the 600 is going to be too small, thanks.