73+ Drum to Disc Options

Uh oh. I apologize.
I should have measured the spindles more closely. The spindle diameter is different. They are otherwise the same casting. Inner bearing for b body is an A6 while later A body is an A17. The difference can’t be seen it has to be measured.(.040 in) Lower balljoint is the same.
So now you’re back to options that involve swapping spindles.
Best option are the kits that include new spindles. They are showing up on eBay for half the price of the Leed kit and they are all new parts.