Looks like a MT-19, the Onan powered version of the M-19. Nice motor car, but really too heavy for one man handling. Are you planning to restore it for operation or static display? Of course, the purists among us would argue that any “true” motorcar should have a single cylinder Fairmont engine. Comparing a Fairmont engine to an Onan is like comparing a steam locomotive to a Volkswagen beetle; one is temperamental as hell, requires the operator to be constantly listening to the engine exhaust to adjust the timer to the speed, etc., while the other is “just an engine”. 
In 1991, when I was in the midst of motor car restorations myself, I condensed notes from several Missouri Pacific circa 1946 track motor car files which had previously been preserved by “dumpster diving” at Little Rock Union Station. The digital file seems to have disappeared over the years, but a hard copy remains – dot matrix printer, no less. A PDF file of that document is attached.
Despite my tongue in cheek discussion of Onan power, I may have a Fairmont maintenance book for a MT-19. If you need a copy, let me know.
Bill Pollard
[attachment=0:3k42otdw]MP-Motorcar-Trivia-1946.pdf[/attachment:3k42otdw]
