If you replace all the common wear items it will take a lot of the "wander" out of the steering.
You can adjust the steering box to take out a little of the play, but don't get carried away. If you get it too tight it will start to bind. There is an adjusting screw with a lock nut on it, right on top of the steering box.
I would also replace the drag link (or inner tie rod), and possibly both outer tie rods. However, the side with the longer outer tie rod is quite expensive because you can't just replace the ends. There should also be a steering stabilizer (looks like a shock) that runs from left to right and connects to the steering.