So when I bought this truck it was a 2wd, I converted it to 3/4 4wd. I rebuilt a set of 73 axles from my travelette, because it had gotten Chevy tons. I also had a new exhaust installed after the switch. It is very easy to convert one of these. I used a 205 t-case from a 70s harvester, rebuilt a spud shaft, and had the rear drive shaft made and balanced, also had to grab a front shaft, had it balanced also. Here in montana 4wd is used a lot so I have found it very nessary to balance and new joints because of the highway speeds any viberation is really felt. This one is good to 60mph thats about all the truck wants with the 4:11 gears.