I'd say any tractor that had a water pump could supply a heater as after all you just want to circulate the heated coolant via your heater core.
From there hose size is the challenge. Some splitting device would need to be devised I presume.
On my CUT I had a 1/4" bypass that I used to circulate the hot coolant to a small school bus heater core.
LOL, forget how I did the return but all I know it has worked for some 10 years now.
I modified the bus core (about 6 in X 6in) by using a 5 x 5 '12 VDC 'muffin fan' since the old bus fan was bulky and noisy.
Also the muffin fan was much more efficient.