You should be able to run them temporarily, just be careful when entering a steep driveway or gas station entrance, hit is straight and slow and not at an angle.
You'll need to lower the transfer case .5" with any amount of lift up to about 3" or 3.5". I made my own with a metal bar, about 10"x2"x.5". Cut it into two equal 5" pieces and use the crossmember as a template to drill the holes. Remove the stud on each side that holds the crossmember and install 4 bolts .5" longer than stock. They are metric.