I already have a Rancho 4" lift installed. I am sitting at 39 1/4" FTG. I have skyjacker AAL's waiting to be installed to bump the back end up. they are 2" leafs. My plan is to adjust the Tbars accordingly so the truck sits level, maybe a tad higher in the front, 1/2" or so. the shop is telling me i will need a longer drive shaft, and that it will more than likely hit the cross member. anyone have any clearance issues doing AAL's with a suspension lift?