I have a stock '05 Performance Z that I just bought. I'm still learning to drive the thing but would like to start making modifications within the next year or so. I have done alot of research and am impressed with the APS TT. However, that will be one of my last mods. My question is; however, what engine and drivetrain modification should I make before putting an APS TT on to support a daily driven Z that would have good dependability? I'm looking, in the end, to have 400-450 RWHP w/ close to matching torque. I don't plan to run much more than 7-8.5 PSI.