That would be one Awesome Axle Assembly! A TSM Rear Disk Brake Conversion would be an Upgrade you may be interested in.
http://www.tsmmfg.com/2670.htm
Or for Duallies:
http://www.tsmmfg.com/2870.htm
I guess with 39" Pitbull Rockers you needn't worry much about dragging the Diff around.
BTW: What kind of Lift Modifications are you looking at to do this?
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