Front Wheel Stud

I installed front disc brake from a 73-76 Duster on my 72 duster.
Can someone tell me what the factory stud size is? I need to replace the studs to install 17x7 Foose Legend wheels.
The Foose wheels do not fit flush against the front rotors because of the small lip at the base of the factory studs. I hope this make sense
I need to install different studs with the proper knurl but without this lip to get the wheels to fit correctly.

Any help is appreciated.