Old tractors are a lot of fun but when it comes to work, the newer ones will do so much more work in the same amount of time. Better power systems, better hydraulics, and front wheel assist is essential when doing loader work.
And a 4 speed and clutch is a killer when using the loader. After an hour or two my left knee hurts so bad that I get off and use a hand shovel for a break.
I'm not sure that I even need a loader on another tractor
I mostly just need to grade/plow the driveway and level/harrow the riding arena. Also need a big brush hog to mow sagebrush in the pasture. I'm thinking that I would rather have a 50-75 hp real farm tractor with just the PTO and 3pt. The little tractors are so light that they bounce all over the place when doing dirt work, and even 4wd the wheels spin if you try to do anything hard.
If I really needed a loader I could use my old Case or just borrow one of the neighbor's Kubotas.