Using mustang rotors for 4.5" bc

I as well did not read all 11 pages. but I do have a set of stock discs that have been massaged to be 4.5" bolt pattern. My first look through the shop has produced zero results. A clean will be necessary, but Ill keep looking if this is pertinent to the conversation.
I'd be very interested. I'm planning on using KH brakes on my 1970 Dart, have everything from spindles, calipers,pads brackets, and rotors.Upgrading the diff to a D60 with BBP axles so it makes sense to find a method to change the front discs to BBP as well. These rotors are in great shape and I'd love to re use them.