1990 Dodge Tow Vehicle, powered by a six cylinder Cummins Turbo diesel engine, automatic transmission, vin 1B6LE3686LS73 - Government Liquidation
You can occasionally get a $500-$800 running diesel in rough shape off of that site above, the flightline I am linking to also comes in a Jeeplike diesel version. Flightlines are nice because they are usually much cheaper than the other diesels that sell on that site and have a normal Dodge cummins 12v setup with a 5th wheel and pintle hitch. Suspensions are usually 6-8 ton rated dually's
Now the trouble
1. 3 speed auto
2. Short wheelbase
3. 8.56 ratio rear wheel drive
The solution is either
1. Different rearend or
2. Get a cheap MT & a $50 2:1 t-case and run in reverse (aka now your 8.x rear gear is a 4x rear gear.
Unless of coarse you like a 45mph top speed.
Cheers
Ryan