Using mustang rotors for 4.5" bc

Ok solved the problem some are having with the rotor not fitting with the dust shield in there. The problem is the original landing for the mustang grease seal needs to be milled off and you'll have plenty of clearance between the rotor and the dust shield.

Now my question is: is the the outer diameter of the original Mopar seal the same as the outside diameter of the bearing race? If not, does anyone have the outside diameter of the Mopar seal?