Transmission install..

As regards the oilite bushings,
they are a loose conglomeration of molrcules with lots of spaces between the atoms to hold oil or grease. In usage, that grease/oil medium provides the film for lubrication and cooling, and the theory is that the pilot while spinning, never touches the bushing; so therefore, it can last many many miles.
But when the oil disappears, now it's metal on metal, and the bushing begins to wear. Which doesn't seem to make that big a deal, cuz I have pulled a few sloppy ones that had been running just fine.
Keep in mind that this bushing only has to work when the clutch pedal is depressed. The rest of the time, the input gear is running at crank speed.
I have, in the past, had good service from that black moly hi-temp grease, which seems to have a tenacious grip on the bushing.
I do not put extra moly in the cavity.
But this last time, I used the ball bearing type; a new one, repacked with moly by me, and that was in 1999. and yes, I left the oilite bushing in there.