Embellishing a little. If the lift is too severe in the front (over 3"), the front shaft CV boots can get damaged. The tranny and diffs aren't affected.
IMO a 1.6" lift is too little gain for the effort/expense required.
I've got Eibachs on 5100's at 0, Icon 3-leaf AAL, overall gained about 1.5-2" and maintained the factory rake. So far I'm happy with the results.