To revive or not to revive, that is the... well nevermind I'm posting.
I'm rebuilding the non-feedback bbd from the SX/4 right now. I have found a few things the first being that the carb is likely not the original but from a CJ with a manual trans. The second is there's a bit of wear in the throttle shaft and housing. But I read in a manual here that one can buy bushings. So a google search netted this:
http://www.supercooltools.com/html/ZA01/default.htmIt comes with the bushings and more can be purchased. It seems as though you'd want a new throttle shaft as well because mine is worn but the bushing is for the original shaft diameter. 5/16" I believe is what they are (they have other reamer size kits too). I have not found new shafts but haven't tried too hard either. Considering the $ I'd sooner buy a rebuilt carb since doing one would not justify the expense. But if I did that I'd explore other options such as junkyard TBI.
However, if someone wanted to do rebuilds as a side job, say someone with a sanctuary, this might be something to consider. A carb rebuild could be a service that would not require travel to the sanctuary but simply shipping of the unit. It might be something to consider for those interested in the idea looking for more work and thus $. Rebuild kits are cheap so money could likely be made while saving nest members some too when compared to aftermarket rebuilt carb sources.