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Are you retaining the factory transfer case? Planning or have done a slip-yoke eliminator/short-shaft kit?
Is the lift you get SOA going to be high enough or too high?
Ideally, you'd have the ride height and driveline issues settled...Then adjust the spring pad angle to get the pinion pointed correctly, and final-weld the pads on.
I dislike shims when a little more mock-up time would get it closer to perfect... (I was in a fairly major hurry when I built my SOA and cut some bad corners.) Avoid aluminum blocks or shims.