1 word can describe that.
Beastly.
Looks awesome Ryan, should be one hell of a truck.
As far as belt vs. chain, I have to agree with Ryan, the chain would be better, would have a far more solid/crisp throttle feel than a belt, and would be stronger. And as the chain stretched, you could take links out as needed. Cant do that with a belt. Good luck, should turn out awesome.