I'd research and learn about the car before bumping up the horsepower by 100-150 hp.
The simplest way to get that power is
www.cybernationmotorsports.com because turboing is the only way you're gonna get that hp without spending waaaaaaay more than 5 grand. Any money leftover goes into looks or saving for other stuff.
Knowing very little and trying to almost double the power isn't the best move.