Ome 3" which carrier bearing drop ?

If I put on ome 885 with front ome and back with icon progressive aal... How much of a carrier drop will I need? Expecting 3" on front and 1.5" in back. 08 dcsb 4x4

 

I checked my carrier bearing, after installing an AAL.
My rear driveshaft had additional downward pressure...which made sense, since I raised the back 1.5"

I simply added enough washers, lowering the carrier bearing (until the driveshaft had equal movement).

Before I make up some lowering blocks, I'll drive it for a bit...let the rear settle and check again.