Put a lot of miles on M35 Series 2.5T Army trucks, mostly M109 version (shop van on back). They are considered multi-fuel but that is for worst case situations. Use JP8 or Diesel 2, a little mogas in the winter keeps DF from jelling and they run a little warmer. Fuel mileage really isn't that bad, make sure it has the clean air kit (turbo kit). Oh, top speed of 60 mph going down hill (semi-steep) with a tail wind and no load.
No power steering, you will have a strong upper body in short order. Loose the military tires, get civilian type mud/snow tires. You will be doing a front and rear main seal at least yearly, no fun. Hydravac and booster go out pretty regularly and you know what happens then.
The 900 Series 5T is so much better. Strong Cummins engine, 5 spd Alison auto trans, power steering, they will run down the road 60 and a little better all day on fairly level roads. There are shelters that mount right in the bed with a mounting kit (turn buckles) that have ECUs built in. Only bad thing is that most of the shelters need 208 3 phase electricity to power up.
To me, the best use would be by someone with a lot of rough land where 6X6 would come in handy.
Good luck with it if you get one. Oh, by the way, your picture is a 5T not the 2.5T.
SH.45