Dr. Diff makes great parts. I wouldn't mess with anything else myself. I don't have his rear disk kit yet, but I do have his 13" cobra style front disk kit. It's awesome. :thumbup:
Two things to note:
-As far as I know, most rear disk kits require LBP axles. That's not just a matter of the bolt pattern though, you can't re-drill your SBP axles and use them. The axle flange offset is different between LBP and SBP axles. It's why you can't use LBP drums on SBP axles or vice-versa, regardless of the bolt pattern you re-drill. I would ask Dr. Diff to be certain about his kit, but it's my understanding that LBP axles are required.
-Most of the kits require the use of "green" bearings. Ie, not the tapered stock type bearings. Dr. Diff's rear brake kits can be used with the stock style tapered bearings. Without trying to start another "tapered vs green bearings" fiasco, I'll just say that I prefer the stock style tapered bearings. If you don't mind, or are already running green bearings, it doesn't matter. But Dr. Diff's rear brake kit is one of only a couple that can be used with the stock tapered bearings.
