You may be able to use the rear one if the spring perches are the same distance apart (remember, they have different frames). 1500 4x4's use IFS, so you're looking at a good amount of fab work to fit a 2500 front axle to one and have the truck drive correctly. Will also need either custom driveshafts or adapter u-joints (not the best idea in the world) to mate yours to the new axles. You'll also need new wheels (8 lug vs 5 lug).
What is the reason for this?