Additional parts needed for 77 Volare disc brakes conversion to 70 Dart Kelsey Hayes disc. ??

I have a 77 Volare complete front discs set up that I want to swap to my 70 Dart with Kelsey Hayes disc.
Ive read up on it here. What additional parts will I need to make the conversion? Are parts for the Volare discs readily available ?
Will mods need to be made ?