From what I've read, the Jubilee / NAA is pretty different hydraulics
wise from an 8N. I know they did away with the three engine style piston
rings and replaced them with O-rings and a leather wiper which is now
replaced with a rubber wiper. Isn't the Jubilee / NAA when the lift
position control and draft control showed up vs. basic manual up/down
control?

You found a hole in my old ford knowledge. My NAA is the backhoe
tractor. While I've had this tractor and used it hard for over twenty
years, I've never once had need for the tractor's hydraulic system.
Sounds like your NAA is the same as the lift assembly on the Ford 860
with the exception of no leather.

I'm glad to see you don't have the 8N lift. Not one of ford's best
designs. But, keep in mind, ford was the first tractor made with a
true three point system.

Karl