I have a 2000D 4 cyl, simple tranny pto, 4 speed, no PS. Is a '63 model with 3500 hrs prooof meter still working, all original. Some seal leakage between compartments, but nothing worth tearing into. Very reliable and easy to use tractor. The 8/2 would be really slick as would a live PTO, but this works ok. I did repaint it. Bought it about 10 years ago for $3500 delivered.
If yours is a 3 cyl, I have a '65 3000D with the 6/2, live pto and aftermarket hyd outlet. Same with it. I think the hours on it are up around 4500 and no leaks between fluid chambers.
Both tractors are misers with fuel, easy to use and extremely reliable.