Rear Disc Issues - 8 3/4” Rear Disc Conversion Kit
You can...
1. Install Dorman # 610-287 press-in studs
2. Clock the rotor and re-drill the bolt pattern
3. Run it as-is
Although the center bore of those rotors is 0.005" larger than I prefer, most people choose option # 3. The stud hole size is not critical.