CHECK out the BULU 2 chassis.. it has like 3 - 3.5 inches of ground clearence.. and it has a lower center of gravity.. people use a stampede tranny or a losi xxxt tranny..
the belt drive may skip, im not sure as i havent got my TLT yet..
www.rccrawler.com has good info on making a tlt-1 to a tlt crawler.. check out Newbie Crawlers, or Smale Scale Crawlers.. i forget which one...