Not to hijack the thread, or say anything bad about the Right Stuff kit, but Dr. Diff does sell a rear disk brake kit that can be used with the stock adjustable tapered bearings if keeping the stock bearings matters to you.
Yep. I just did the swap myself. 11.7" rotors and Cobra Mustang calipers using Timken tapered bearings. I just need to finish up my lines though. Good thing about this swap is that you can opt for a parking brake for $100 more.