Nope, spindle has the lower mount right at/in line with the hub for ground clearance. In order to have both ground clearance and 4wd you'd need to step up to a portal setup.... or TTB'sTo be honest, I didn't dig too much to find out so you are probably right. The J-shift is in and works so its low on my list to find out now.
There isn't a way to run 4wd on the burg race kit is there? I would be interested in it if so but I don't think the spindles allow it.
The Camburg race kit is capable of 18-20″ of wheel travel. With billet 2.0 race hubs, Wilwood disk brakes, custom fabricated spindles, and lower A-arms with 1″