farm tractors mostly run on diesel cycle engines which typically are more efficient when utilized with odd number of cylinders. A 4 cylinder would most likely run on gasoline.
Long before farm machinery had cabs on them -farmers had only ONE way to get out of the sun to take a break after long hours of plowing or harvesting their fields. Solitary trees ALSO made good landmarks, shelters (from sudden showers), and private "...
Kits of old tractors, that's gonna be tough. I don't know of anything currently available in 1/24 and 1/25 scales which are the more common scales for vehicle kits. I think you would have better look with diecasts. However Ertl did make some construc...