Any Towmotor experts out there?

I just acquired this little Towmotor yesterday. I thought it would be handy moving stuff around in my new polebarn. I plan on setting up some pallet racks at one end to store stuff on and have most of my implements on pallets too. At any rate I was wondering if anyone could tell me a little more about it. The model # is 510PG2024 and serial # is 510P640171. It’s a type G. Would any of this determine what year it is? I believe it has a Continental 4 cylinder. flathead engine. I haven’t got it running yet but the engine is free. The clutch was frozen up but I got it free this afternoon. Its been sitting for a while but doesn’t look too bad overall. I want to change the fluids before I try to run it. Any good part sources for these critters? I’m missing the rear cover that would go over the radiator area.
Thanks in advance
Tim

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I have an old Towmotor 440 with gas continental Y112 motor.

Only thing I've done to mine over 3 years is a new capacitor for the points & 3 plugs. The 4th is covered by something coming out of the head don't know what it is so have not messed with it!

I do use it year round so it has antifreeze in it.