i want to get some new siemen deka injectors. im going to be running a 75mm turbo'd 306, afr 185 heads, system max intake, 75mm tb, stalled aod. im looking to run 9 lbs of boost and i need to know what injectors i am going to need. i would like to get a set of 60 or 80 lb injectors, my question is what is the differenace between high impedance and low impedance? whats is better for tuning?