DRW= Dual, Rear, Wheel. You would have to replace the hubs to a SRW(Single Rear Wheel) or run H1 wheels in stock form. New hubs are around $180-new each. Its driver side diff. Other than that it will work great.
Its a dually front end Bruce, they made the wheel hubs wider to make up the width in the rear for dually rigs. Simple fix find a vender on pirate and get new wheel hubs.