The engine is the om352, same engine as they used in the mogs. At 130hp it will be a pig on hills, unloaded that truck is as heavy as my empy mog camper.
They are great trucks, if you can fine one with a busted engine there are lots of more power engines in the 352 family that are pretty much direct bolt ups. The turbo'ed om352A or the om366A/om366LA. One of the mog owners put a tweaked 280hp om366LA in a 1300 and he can go up 8% grades at 70mph.
You don't inherit the world from your parents, you borrow it from your children.
1979 Unimog 416 Expedition Camper
1974 Unimog 421
2004 Dodge Ram 2500, 4x4, Double Cab, Cummins Turbo Diesel
2006 25' Airstream International CCD
2009 Harley Davidson
Sugarloaf, Boulder, CO