Can you get enough traction just starting with Locked axles or Limited-slip?
Do you want to keep the 3-spd?
Do you want to be Full-time driven or Selectable front drive?
There's a lot more info here over in the area for offroad 6x6, 8x8, 10x10...
https://rctruckandconstruction.com/f...splay.php?f=27
https://magomhrc.com sells a conversion
Since the Mercedes Benz AROCS is Cab-over, it's probably going to be more difficult than Conventional. Also you'll probably need to do a some body-lift and trimming mount plates