Woody - Hope you have seen the '69 Sag. w/O.D. post Cosmo did yesterday. Reminds me of some I've bought. I've got three A-833 N.P. 4-sp. on the floor now & still need more parts to make one good one. Ha, Ha.
The brass synchro rings are very lightweight compared with B-W or Muncie, you can usually expect to repl. them, & their shift forks likewise, probably a front bearing. Once its built right it''ll be a great trans for a very long time behind a 235, though, & a lot cheaper than the alternatives. Problem is, the age of all these & the fact that very few commercial shops do a thorough rebuild. You can get by with a lot of marginal parts when you're only giving a 90 day guarantee. And that little whine that customers hear in neutral, 'Oh, they all do that'. Yeah, right!
Doug