BBP rotors for a 1968 Dart GT using the same 4-piston calipers???

Is your car drums or disc? If it’s the SBP disc I believe can swap rotors from a similar age mustang. There is a very good thread someplace about it.

If I remember correctly though it still involved machining the rotor a bit to fit the bearing or or caliper or something

Sticky thread right in brakes...

Using mustang rotors for 4.5" bc