Make you should get the type of cam that has lobes on it.
Seriously though like jsw said, if you are still running the stock heads and intake you are largely wasting your time. You have gears and exhaust now, I would look at the suspension on the car, and invest in some full length subframe connectors.
When I started modding mine, I knew it was going to be while before I was able to dig into the engine/drivetrain. So I did subframes, springs, dampers, a five lug conversion, and Cobra brakes. The car was still pretty slow, but it made it a lot more fun to drive in the mean time. Plus now I have a better foundation for go fast parts.