I had to take the hi/lo trans in my 68 SS12 out for something else (axle seals) and I find that the nut for the input pulley has been brazed to both the pulley and the shaft. Also, the pulley itself has got a pretty prounounced wobble to it. Probably 1/2" difference in clearance between it and the trans as it rotates.
Any guesses as to why someone would braze it on like that? What comes to mind is; lost key, mangled keyway, or mangled shaft threads.
A part of me wants to grind those brazes out, see what's the problem, and deal with it. The other part doesn't want to open a can of worms and potentially have to start replacing hard to find parts. (I'm just assuming the shaft and pulley aren't easy to find)
The tractor doesn't see anything harder than light mow and snow duties, which it has performed for the last 2 years, with that (unknown) wobbling pulley, just fine.
Guess I'm just looking for opinions that may nudge my decision one way or the other.