My advice would be to spend your money making the car hook up better, your mph indicates at least high 11 quarter mile times, yet your running 12.48, and your happy about it! Hook the car up and you will be even happier, I feel better headers and such will slow you down because of the increase in power, which you dont seem to be able to utilize as it is.
No flames intended, I don't know your car well at all, but going by the numbers YOU NEED TRACTION!!!!!!!! not more power.
