You know, I didn't want to install my kit without heads either but everyone kept telling me to go ahead, I wont regret it. I'm only running 7 lbs with a Cartech outlaw kit and a T67. I only have an edelbrock intake, 65mm TB, 5 speed, stock heads and gaskets too, and 3.73's out back. Trust me, just by installing the kit, the car will scream. I was ripping my tires loose in 3rd gear. Back then I was running 19 lbers and an fmu. Now I have an 80mm Lightning MAF, 42 lbs inj., T rex inline pump, Manual boost controller and I'm scheduled to have a diablo sport chip installed and tuned on a dyno. The guy who is going to tune the car said I should "at least" have 400rwhp with 10psi. I do plan on putting a top end package from TFS on the car when time and money permits. I have driven the car for 4 months everyday to and from work 50 miles round trip with out a problem, I did end up changing my TFI module and Dist. and my T/O bearing went, so I installed a King Cobra clutch. This probably stems from the car sitting while I was on deployment. Anyways, install that kit and have fun.