It sure looks like the manufacturer used a lot of off the shelf truck parts from the era--the engine, probably the transmission, the front axle and leaf spring suspension. There probably was a choice of a number of engines that would fit the chassis. I am not familiar with that rear end, but outwardly,it is about the size as medium trucks had then. Some of the posters mention rototillers on these tractors. I did not see a PTO shaft in the photos. Is the PTO handled by an add-on case bolted to the side of the transmission case? To do rototilling, a tractor has to move very slowly. How is the slow speed acheived, through transmission gearing, or are the rear gears way steep, like 10 to 1? Your tractor, though done much more professionally, reminds me of a homemade tractor some friends made out of a 40's International 1.5 or 2 ton truck. The front end was intact with the hood covering the original engine and front axle. The cab, which had been ruined in a roll over was cut off and the frame was shortened to long tractor length and the truck rear end with duals was mounted solid to the frame. To get it to go slow enough for tractor work, a second 4 speed transmission was mounted just behind the original 4 speed and a very short driveshaft mounted to the rear end. A huge block of concrete had been cast above the rear end for traction and they always left the duals chained up. In compound in both transmissions, the machine would go extremely slow, and as we found, in high in both transmissions, it was scary (and dangerously) fast! The brakes left a lot to be desired though. We had a lot of fun with it and they did their heavy pulling with it for years.
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