Hmmm... Yes I think I heard that somewhere before.
As I mentioned, you might want to PM PhilD.
http://www.trailduty.com/products/fabtech/index.html
It states the following:
"To properly address the H2's fulltime transfer case Fabtech include a CV style front driveshaft to provide smooth driveline operation. Ride height is increased to 6" over stock for clearance of tires up to 40". Rear lift is accomplished with either an extended coil spring or air ride spacer system."