What race are you using it for? There are myriad responses to your question, as we've no clue what you are running for power, what race you're in, nor what you want it to do.
Your question seems pointed to a race, but we can't be certain. 1/4 mile, Grand Valley, trial mtn, super speedway?
Help us out and we can help you out.
Ahhh... Tree'd by Gil.
AO