why you wanna change if you have both axles already? is it to save you the cost of new wheels? I can understand that.
However, if you plan on going to beadlocks eventually, you might just think about keeping the 6 lug pattern, buy the new wheels, then get the DIY beadlocks sometime down the road.
that's my plan with my 44s. (both out of waggy's w/6lug pattern).