Here's a 1945 international harvester 2 ton truck that is still in use today getting logs delivering firewood and doing other hauling needs. Truck has 308 CI straight 6 with 4 speed "bump box" transmission over 3 speed shift case coupled to duel rear end so has very low gears but also can go 60 mph with the engine only turning at 1000 rpm. If you hit a big hill however she's a bit slow.