Found my stud problim

I went through the same thing (sort of) on my 72 with KH discs.I replaced the factory studs with new Dormans on the new rotors.The hitch was the factory stuff was flat on the hub end and the Dormans were bulbous,not letting the hub fully seat.Luckily I had my old studs,this was discovered while trying to get the front end aligned.Even with an air hammer the Dormans would not seat enough to keep from interfering!

Glad you found the cure without having to pay by the hour!