Hi Brandon,
Thought you would be interested in a previous discussion on steering problems. The discussion includes the steps used to rebuild a steering box. The box being rebuilt is not identical to yours but very similar.
I would add an endorsement of John Deere Corn Grease for lubricating the steering box.
Glad you found the Pitman arm
rubber bushings as your problem.
Play in steering box Good luck on your rebuild, Mike
P.S. I think you could do a better job if you remove the entire steering box, and then take a good look at the Thrust bearings and replace the Pitman shaft bushing. The steering box comes out from underneath the car. The 41 manual covers the steps. I would also remove the generator to have the extra room to work.