Those heads aren't doing you any favors. I would definitely get a better set like Indy's or even Edelbrocks. I prefer the Indy heads. Why not make more power naturally aspirated so you don't have to spray it. If you are already willing to spend the money on a roller cam, then you will have no problems making 650+ hp naturally aspirated with a decent set of heads. I prefer solid cams any day over a hydraulic cam but either way I would never run another Hughes cam.
