Manual steering box worn out or can be adjusted?

The guy who just did my front end alignment confirmed what I already was suspecting - my steering box is sloppy, has too much play. I guess its just been such a gradual thing over the years it took me a while to really notice.
1971 Demon with 360 (originally slant 6 car)
Can it be adjusted to get the slack out?
Or is it time to get a new steering box?
Thanks for your help!