I recently went through the exact same thing on my 67 Barracuda knowing nothing about the disc brake conversion. These look exactly the same as mine. Found out it was the same calipers as on a 1980 Dodge Diplomat (M body). If you check out Rock Auto you can see in the pics they provide and almost certain these are the same ones. No idea where The parts store is coming up with foot piston calipers (at least stock). Heads up those two nuts over the metal spacer are what hold the calipers in place. Don’t do what I did and take off the caliper mounting bracket bolts in the rear! Just a friendly heads up.