Welcome. This forum is pretty dead these days unfortunately, used to be really active.
With a cammed and exhaust 4v on a good tune, you'll probably be able to hit around 350 rwhp. Camming the 4v is a little expensive. If you can afford a little more, you might want to consider just picking up a used centri like a Procharger or Vortech and crank it up to 450 rwhp!