Scarebird Disc Brake Conversion
Back in December '19, I ordered adapters from Scarebird (https://www.scarebird.com/). They make adapters to put disc brakes on a wide assortment of cars. The kit includes adapters, some minor hardware, and a list of brake parts (rotors, calipers, hoses) that you will have to buy.
The kit I bought is for '63-'73 Ford Mustang, Falcon, Mercury Cougar, or Cyclone with 15" or larger wheels. This is the kit: