Cant figure out what these calipers came off of????

I recently traded someone a transmission for a disk brake conversion he claimed was off of a 65 barracuda, but im not showing any disk brakes for that year. Can anyone help with some info on these, my guess is after 67 but everything i find seems to be 4 piston and not 1. Im showing 4.25 from bolt to bolt which seems true to mopar.

Thanks,
Jake.