I think "short strand grease" means something not too thick. In the old days, wheel bearing grease was "long strand", I recall. I used bicycle bearing grease, because I have a tub, it is high quality (bikers are finicky), and it sure looks like a bicycle wheel bearing. Otherwise, moly wheel bearing grease should work fine.
I posted a few years ago the rebuild of my 65 Dart steering column so search that. I cleaned rust and painted the inside of the tube since the factory didn't paint it well. There is supposed to be a plastic seal at the bottom of the tube, but few left in any cars today. Several fixes have been posted.
