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.
Rob
You don't inherit the world from your parents, you borrow it from your children.
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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