I believe the the Alaskan hauler is how the rig is set up, not any particular model. The main mods are the moose bar and the propane system. So any diesel available could have been installed by K.W. , trannies are again a matter of choice..bbut remember that speeds were generally in the 10 to 35 mph range. As for axles the weight and number are up to builder. Hope this helps. Paul