Which bracket is being referred to here? If it's the pedal support I believe it's the same as for manual brake vehicles. I did the swap from manual drum to power disc on my '67 Mustang back in the '70's and remember having to change just the pedal. I found out the hard way. Can't remember where I found a used one but it was shipped via Greyhound bus! I couldn't wait to get notice that it had arrived so that I could drive to the depot in downtown SF and pick it up!
Craig R.