UCA Bushings don't fit?

There's only two things wrong with 9" drums ;
The first is
the spindles break off as soon as you put more than skinny 13" tires on them and stuff her into a corner. And it will do it with a slanty just as quick as with a V8. And when it happens, you will be very sad, cuz the wheel keeps on going, until it hits something or runs out of energy. But on it's way out, it could take out some nearly irreplaceable sheet metal.
If this happens to you, I got a box of spare spindles I might be persuaded to part with
The second is that with skinny 13s, the car don't stop worth spit.

The problem is that tiny outside wheel bearing, that is barely the size of a wheelbarrow bearing. Mine have always broken right inboard of that bearing, and ziiing goes the wheel and everything crashes down, and the car comes to a screeching halt; fastest stop the car ever made, and I never even touched the pedal.
I have never had this happen with any other non-9" drum, A-body, including when smashing into a curb hard enough to destroy a wheel..