I found a knob labeled "PTO" and cable in the cab of my 3/4T! Wowee, I hopped out and checked underneath. Nothing, notta, nichts...except for the end of the cable dangling.
34 Years. Now with a '61 261, 848 head, Rochester Monojet carb, SM420 4-speed, 4.10 rear, dual reservoir MC, Bendix up front, 235/85R16 tires, 12-volt w/alternator, electric wipers and a modern radio in the glove box.