1971 Dart Swinger Steering Gear Adjustment needed.

If you do not have a shop manual for your car, please down one, its FREE....I would jack up the car, put it on jack stands (that u trust) and have a friend gently rock the steering wheel back and forth. While you are under the car look closely at all greasy parts and see if you can locate the slop... Garb the front wheels give them a twist, lots of things to check, before I would start adjusting the box...You can always take the car to an alignment shop, and have them check it out...but replace the parts yourself.