Well, the 68 Hemi Dart's and Barracuda's did use the 4 1/2" inch bolt pattern, and 1/2" inch wheel studs, so you just might have rotors-hubs, from those cars.
On the back side of the hubs are there the letters K/H cast in the hub?
Where did you get them, anyway?
An old racers stash of parts?

And, no 72 A Body car, ever got a 4 1/2" bolt pattern.

Someone just brought this to my attention.
Possibly, you have Ford Mustang rotors, they are 4 1/2" inch bolt pattern.
But i would need to see an official pair of early Mustang rotors and hubs, to compare.

I doubt a Ford two piece, rotor, hub, is machined to work on a Mopar spindle, (knuckle) or it would have been done long ago.
Even though there is a vendor that re-machines one piece rotors, with 4 1/2" inch bolt pattern to work on a Mopar spindle.