Mopar 67-72 Kelsey hayes 4 piston calipers

Pardon my ignorance... what spindles, caliper brackets and rotors are needed to use these.
Would I be wrong in guessing that if my car didn't come with these, I would need to source the caliper brackets, rotors and spindles to go with them too? Just curious...
64~72 disc brake spindles, no brackets, the caliper mounts to the spindle so you'll need those bolts which i think may be specific. then you need hubs and rotors, it's a two piece design. the rotors are avail, but hubs are NLA so you'd need to source some used.

here's a vid with some info: