First of all, I wouldn't go LS/Vtec. You said yourself you were in High School and didn't want to spend a lot of money. Getting a Vtec head is a lot more than you think and could run around 2 grand after parts and installation. Plus, I doubt nitrous and LS/Vtec is a good combination. People with the Vtec head on their stock LS's have said they've had problems. Nitrous wouldn't help. Solution: Look around for a deal on a low to mid-grade turbo package(add about 50-80 hp). You should end up saving money with the turbo over LS/Vtec plus a nitrous system. And your car won't fall apart as fast either. The only downfall is that you might end up winning every race depending on where you live.