With all that I know now. If this car is your daily, do NOT open the motor. With any cam (besides the LS6 cam) youll be changing springs every 12K TOPS! Comp 918s have a life of about 12k miles.... ususlly alot less.

Since I dont know your mods, I would get a good lid, filter, headers, 3500-3800 Yank stall, tranny cooler, good exhaust, gears, tires and a tune. Youll have the OEM reliability (since you didnt open the motor), but it will flat get up and go.

Just my $.02