well, those all say they use roller lifters only? I will be using a regular hydraulic flat tappet cam. I am looking in the 1300.00 price range and am kinda set on the 84cc E-streets, but just wanna make sure there arent any better flowing heads out there for the money than the E-streets.. Someone mentioned the promaxx and i wasnt sure if they were a good head or not as i havent heard much about them..?