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...
You can score the rotors from summit for 30 bucks a piece no brackets. If you have the spindles you can build the kit your self for around 400 bucks. With new ball joints too.