Some suspension and brake questions

Lots of debate on the later use of small balljoint/large balljoint A arms and the timing of their being phased in/out, but the easy solution if you find you actually do have the small balljoints is to just use Doctor Diff's balljoint sleeves so you can mount up the disc brake spindles.
Mopar A-Body Upper Ball Joint Tapered Adapter (doctordiff.com)