Do you want to retain the factory axle adjustment, or go with Green Style bearings and eliminate the adjustment?

DrDiff IIRC has the only kit on the market that retains the factory adjuster, utilizes Cobra components

I personally have used several rear SSBC rear disc set up on 8 3/4 and DANA 60 axles, 15" rims are the minimum for clearance, you retain a parking brake, Green Bearings are required, utilizes Cobra components

either kit will work depending on what you desire, just be sure to research or ask questions to avoid any pitfalls when installing any mfg's kit