Well it's now in my barn! The owner cleared the trees, vines, and brush away from it then kindly pulled it out with his jeep.
It is indeed an 8N and not a 9N like I had thought. The loader has a tag that says Wagner Ironworks.
Once I got it home, I took the jungle gym off to focus on the tractor. It turned over with a wrench so I let some penetrating oil sit in the engine before changing the motor oil and filter
I rebuilt the carb and bought a new 6volt battery. It turns over well and fires up on a little water bottle of gas. It does smoke a little, my guess is a leaky or sticky valve.
There is good green coolant coming out of the block petcock, BUT there is oil floating on top of the radiator. I may try suck the oil off the top to see if that would help. The oil in the block still looks good after running it a few times.
After a good power wash it doesn't look too bad, next is taking off the tank to clean out all of the old gas and corrosion. I plan to flush the radiator and fill with fresh coolant, my dad suggested re torquing the head bolts at the same time, or replacing the head gasket while the hood is off.