The engine wasn't overlooked, either
When it rolled off the assembly line, 96hp was perfectly adequate -- Power Wagons were built for rural work, after all. Its gearing was incredibly steep to make up for the lack of power, which severely limited its top speed. That wasn't a problem, though, because the interstate highway system wasn't a thing back then. Now, it's sporting a modern Cummins turbo diesel that theoretically means it can bring along a total of over 16,000lbs, including the weight of the truck.