Ed , a new , better quality shell is to come out in a few weeks . I receive my now old version today and tried the LL and Kato drives as was also tried by somebody on the A-board and agree its a no go . The width of the inside wall cavity would preclude using a LL SW or Kato NW chassis without getting rid of the chassis frame halves , then redesigning the the truck pivot method . There is some talk about the CC SW as being a possibility . I think I will get some trucks and a fuel tank and make it a dummy .
Edit , I just tried the CC chassis , and with just grinding down the bulge area in the mid section of the chassis , it will fit snugly . It is doable , and I just might try it .