Help needed! Stock drum? studs on drum? off of different car? 1972 swinger

So i looked at ssbc and like blu said there is no kit for 9 inch spindles. Now i have yet another few questions 1. can i convert over to 10 inch spindles? 2. If im changing everything anyway can i even go to a little bigger of a bolt pattern like the 5×4 1/2. And of course i have to change rims for sure then. been looking at scarebird kits and reading up on them but they seem to not fit stock steel non rallye rims. saw people that contacted them apparently they simply said nope. So pretty much screwed on that. By the way thanks for your guys time so far!
They worked on a conversion we did on a 68 Dart with 9 inch drums - both standard 14" steel rims and Rallye wheels.

6 months ago I bought replacement calipers and rotors for the SSBC brake conversion on my 70 Dart i did 17 years ago - a lot easier than finding some parts for the factory K/H brakes on another 70 Dart I have... replacement calipers are easy to find as they went on a bunch of Fords.

The drum and hub assembly comes prepared for studs in the big and small bolt pattern

Yeah that's the other one. I thought there was but I couldn't remember. I ain't sure I'd use the 9" spindles. They're pretty small.

I wouldn't. I don't like the small bolt diameter for the lower ball joint or the small diameter outer wheel bearing.

But if keeping the factory 14" drum wheels is a requirement that's pretty much the only option. I don't think any of the 73+ disk conversions, even drilled for the 5x4" pattern and with the hub turned down will fit the factory drum wheels. Heck I'm not even sure the factory KH disks will work with all of the factory drum wheels.