RE: what is the fastest truck i can buy or hop up?
Im assuming you mean a monster truck since you are in the MT forum. I would guess a mad force would be a good project for speed, or the upcoming Losi. Either way, you wont get a stock MT that fast without a motor, new gearing, pipe, etc. The mad force would be a good choice because of that 3 speed. I would bet with a high end .21, and the right gearing, you could get it that fast. Honestly though, where do you plan on using that speed. You hit ANYTHING going that fast, and kiss it goodbye. The shumacher menace goes that fast out of the box, but its not an MT.
Matt