sounds like you have the clearance you need already? how much more will/can the driveshaft contact the exhaust? is it even necessary to change anything?
basically you are trying to prevent the axle from coming up too far. You need to add some bumpstops, whos job is to limit uptravel. there are many options for bumpstops, from expensive machined aluminum pucks to hockey pucks and everything in between. from a few dollars to +$100.
you could also extend the catalytic converter hanger to push it back up the 1" its dropped due to the t-case lowering.
so do you want to do exhaust work or suspension work.
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