Mopar 67-72 Kelsey hayes 4 piston calipers

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:

Nice video, Thanks!
So small bolt pattern and small ball joints if you want to run these calipers?