Tork-Tech are good kits, go by with what the website says.
You will need to upgrade fuel for sure. Its better to be safe then sorry. If you are on a stock bottom end, 350/400rwhp should be fine. I'd have bigger injectors, and a different fuel pump.
I ran Aviator Fuel pump/39lb Injectors on about 375/400rwhp and it was perect. You start making well over 400+ and you will need to upgrade to bigger injectors.
You will need a different clutch. The 3650 will handle the power, but you will need a stronger clutch. I'd go with a Spec, Ram HD, or Centerforce DFX.
Hope this helps

__________________
-Tommy- 2003 GT Fully Built/Boost
S4 Blower / 12psi / Chicane Intercooler / Fully Built SB / Ported heads/ Blower cams / Bolt-ons / 3.73 Gears / Zex N20
11.9 @ 119mph 1.9 60' (Full Weight, Stock Susp)