I'd make sure the oil cooler is up to the task, and probably get some bigger brakes. Aside from that, I think you need to target making a good street/DE car as a first step.
If you reach the point of club racing, you'll probably want to build/buy a car to match the rules of the group you happen to end up choosing. Guessing the class you'll want to end up in, at this early a point, is a little like picking your future wife's hair color when you're still in grade school.
