Interchangeable A833 input shafts

If you are talking the interface rollers between the inside back of the input gear and the mainshaft(MS) pilot;
I have never in my life heard a sound from an A833 that I could positively say was coming from there. Not saying it can't happen but just that I have no idea what it would sound like.
Nor have I ever seen a A833 damaged in those areas.

But what I really want to say, is, that if at all possible, I would NOT swap a used input from one used cluster to another. That would be risking more noise, as those parts usually wear in together.

Just so you know, IIRC there are FOUR different A833 input gears, by the tooth-count. But all 68 boxes with the 1x23 input should be the same.
If yur gonna swap stuff, just put the short tail housing and M/S from the Dart box, into the long-tail main-box.