In my opinion weight reduction is best performance enhancer you can do for 2.7. Lightweight flywheel and clutch disc, lighter 17" wheels, lighter brake rotors, Carbon fiber lids, lighter exhaust system. One thing I can recommend is to have injectors balanced and calibrated at RC Engineering.
http://www.rceng.com/Fuel-Injector-ProCal-Service-P44C0.aspx?UserID=5763782&SessionID=lHNgfyOR8YuO0rQp6oGZ
My little 2.5 will make mince meat out of a heavy street going 3.4 car at speeds under 75 MPH. It would make a believer of anyone who underestimates value of weight reduction
