Spoke with tech at cpp, they suggested to chamfer the disc.

I am going to use ARP 100-7703 studs, Knurl .625, lenght 3.5", shoulder .400.
The disc will need .080 or the shoulder will need to be taken down .080 for the disc to fit flush.

Once installed I will take some pictures, and this will hopefully save some time for the next person having this issue.