My Neighbor has a 1953 M-37 3/4 ton Dodge Power Wagon, ex-military vehicle, with a smooth running flat head six cylinder motor. He uses it for plowing snow, hauling firewood and general work. It works but is far from pristine with rust etc. An amazing truck.
There is another one of those trucks, not far from here, that is pristine (been restored) with a convertible top.