Do you have any suspension mods right now? I dont agree with building up suspension after building a motor. Most often, stock chasis and suspension isnt capable of efficiently supporting a more powerful motor. The stock suspension is crap unless you weigh about 60 lbs, and the frame is pretty weak. Going fast is easy. Staying planted on the ground is a little more difficult. I would always build suspension first, then motor. You can catch big air on a stock motor, but not on stock suspension. Not to mention, riding on bumpstops is dangerous.