I'm seeing some slop in between the Pitman arm and the "socket" but am having trouble finding that part lists on Lang's website.
As I was backing down a dirt hill today I was surprised the wheel was suddenly jerked from my hand and oscillated full stop right and left a couple of times. Hmm... time to replace everything that seems a bit loose.
I call it a drag link. Not sure if Ford did or not.
BTW, a T is very unstable in reverse at much more than a crawl. The same forces that act to stabilize it when going forward, work against you in reverse. Most notably "caster" or the angle that the front axle is tilted rearward.
Caution is in order when in reverse as Mr. Hal has stated. Go slow and keep a firm grip on the wheel with both hands. Even with a good tight front end it will tend to want to pull the wheel either direction to full lock. If you are not at idle speed it could put your car somewhere you don't want it to be. It's just a T's nature.