Seller notes this is built on some jeep drive train. It makes me wonder if it was a Topeka Mower chassis?
https://greenbay.craigslist.org/grd/d/sturgeon-bay-homemade-loader/6819812617.html
“I have a homemade loader, has 3cylinder Diesel engine. Rear steer, not sure of make of engine. Needs to have brakes hooked up. Runs and moves fine. I believe that the drive train under it is from a Willy’s Jeep. Has high and low range. I don’t know what the lifting capacity is or the total weight of the machine. I had it on my 6×12 foot single axle trailer without any problems.”