Never owned, but drove one from Springville to North of Salt Lake somewhere, like head east before you get to Ogden and then back to S-ville.
Truck was loaded to the gills with Rebar, and it had been aftemarket enhanced in the suspension department and was towing a form trailer loaded to the hilt with Forms, I know I was at least 16-18,000 pounds, t and t.
Pulled 70+ all the way up, got 10, maybe. Coming back with just a truck load of rebar, heavy load of rebar and stakes, mind you, it did closer to 12 and felt like a hot rod, good motor, was happy with the loaded performance..