Sure would not know that the "wheeling craze" was over if you were on the Con this last weekend. There was over 2,000 people on the valley floor at Rubicon Springs this last weekend for the Jeepers Jamboree!!!!
Your best bet is to go dual, gear drive cases with 4:7's in the rear case. Awesome combo and you have the stock low gear for "fire roading" I started with one single gear drive case with 4:7's and with in a year I had dual cases, missed the stock low gear. When I put the single case in I used the stock x-member and the stock D-shafts. When I did the SAS I had to get a long slip d-shaft for the front.