Do not use an air wrench to put the caliper bolts on! The rubber sleeves on the calipers make it pretty easy to mialign the bolts. The metal in the calipers also must be pretty soft to start with, myself and others have managed to strip the caliper bolt holes. An air wrench is a sure way to do it.
99 Durango 5.9, FT 4x4, IP stage III w/ K&N air hat, M1, MOPAR PCM, Fastman TB, 1.7 RR, JBA headers, Borla cat back, Martin Saine valve body, Hotchkis swaybars, Blistein shocks, lowered 2" Black Rhino Kenya wheels, 246. 7 RWHP, 319 TQ