Once you get to your lift height it's time to install a SYE kit into the tcase (not a difficult job) and a CV driveshaft. At your lift height the OE driveshaft is too short. Once the SYE and CV driveshaft is installed you'll be able to remove the tcase drop. You'll need adjustable length rear control arms so the rear axle's pinion angle can be raised to meet the requirement of the CV driveshaft.
This is how the rear pinion angle needs to be raised for a CV driveshaft. The pinion shaft/angle needs to be raised so the pinion points directly at the CV joint, exactly in line with the driveshaft.
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