You have to take into consideration that if you raise your transfer case it is exactly the' same as raising the lift with springs.
A 3" spring lift with a 3" transfer case raise due to a belly up creates the same driveline angles as a 6" spring lift.
You will need quite a lot of modifications to make a truly flat bellyup work.
Upper and lower adjustable control arms and an SYE and double cardan driveshafts.
I have a custom made skid that keeps the rear of the transfer case at basically the same place as a stocker.
The rest of the skid is formed to make it smooth and provide as much clearance as possible everywhere else.
It extends a long way forward and has a cutout for the front driveshaft.
I would be looking for something similar or making one yourself.
An improvement in mine would be to create a transfer case mount that was seperate so that the skid could be dropped easily for maintenance.
This is the best pic I have of it at the moment.