Convert from hub rotor assembly to separate parts?
The '73+ disk and drum spindle uses the same wheel bearings but pretty sure the cars earlier than that do not.
@AndyF used the drum spindle with later 11.75" rotors and Gen1 Viper calipers.
This is what I did:
Some tape and a hacksaw is all it took. I had a shop true up the edge just because, not sure it was really necessary.
But I am running a home built PBR caliper and 13" Mustang Cobra rotor BBK kit, not really a slam dunk for what you are looking for.