A lot of the above drama can be sidestepped by acquiring a carborundum button hone a few thousandths larger than the transmission input shaft snout, and using a variable speed drill motor to fit the bushing ID to the shaft. Since the only time there is relative motion between the bushing and the input shaft is during shifting, or maybe idling in gear with the clutch pedal depressed at a stoplight, the fit isn't terribly critical.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
Love your enemies and drive 'em nuts!