Manual steering box worn out or can be adjusted?

cudamark said
The worm gear end play adjustment is what puts a slight preload on it's bearings. If there is slop in there, Stop.

I didn't need to go any further than that first adjustment test you mentioned. The bearing has been running loose. And considering it's the original 1971 steering box I think I should just replace it.
Any good after-market suggestions?
Thanks again!