mine brandon, is an early unit, 1958, no PS, two point fast hitch, under exhaust.
for S/N look here
the parts manual indicates that the tractor could have either type exhaust.
the changeover, if you will, to the now standard 3 point hitch, was right around the time these tractors were produced. my parts book, issued 4/1960, shows both 2 point and 3 point as attachments.
my thinking is that the later tractors would be more likely to have a 3 point setup.
nice looking tractor, BTW. do you have a source for hood trim parts?