Explore rear disc brakes

I was trying to fit '96 jeep Grand Cherokee disk on my 8 3/4 last night. Disks fit fine, but the caliper adapter is 3/8" thick and causes the bearing to barely engage the axle housing. I have the green bearings on yukon axles as info. I am trying to figure out a way to modify the caliper adapters and make it work. Any suggestions?