Do you plan on doing this with stock lengths arms?
also whats your intended tire size? with that much lift, you should be in the 35-36" tire range, and at that point you are pretty much beyond the useable strength of your axles in stock configuration.
I've mentioned is plenty of times, I've sheered a D35 pinion with stock tires and welded diff. The D35 is a turd of an axle. The shafts are weak, the pinions are weak, the ring gear is puny, the center pins easily sheer, and carriers are prone to cracking. They do make goood boat anchors.