You'll need a new front driveshaft, adjustable track bars front and rear, and adjustable control arms front and rear. Unless you already have any of those parts. Also possibly longer brake lines, and a alignment.
When you think about what a lift does, it moves the body mounted portions of the suspension upward. It does not affect the differentials, which are mounted in the axle assembly. They are affected only by tire diameter. So a lift kit will improve your cross-over clearance without changing the front or rear ground clearances. The front drive shaft is placed at a steeper angle from the transfer case to the front differential, which increases stress on the articulation points where it leaves the transfer case, and where it enters the front differential. The differential end sees more stress because the axle travels more than the body end. Bigger tires improve the clearance of the differentials, but they don't change the geometry between the lifted elements and the axles. Those steeper angular transfer points are likely trouble spots; they are trouble even in unlifted vehicles, so higher lifts call for adjusting the linkages that connect the body mounted suspension element ends and the axles. The chief things I would look for are the track bars, sway bar linkages, drag link, and control arms. All of those change their angles of articulation when lifted.
