Forget Chiltons. I don't really mean that but they are NOT adequate. You can download a 73 manual free at MyMopar. THAT MANUAL IS NOT CORRECT for wiring.
Get a helper and watch the column, the coupler, the shaft into the box, the pitman shaft, the ball at the pitman, in other words every single thing that moves, as your helper moves the wheel back and forth
To check lower ball joints you must jack the car up UNDER THE LOWER CONTROL arms to take the "bind" off the lower joints. Some of that is in the shop manual, as well
If you have no history on the car, and it doesn't look "anything newish" under there, I'd plan on replacing every bushing ball joint, everything that moves, except the idler if it is OK and the pitman arm if it is OK
