Just got through doing my fronts, they're a direct bolt on. It was said earlier that there is no difference in the rear? Only about 4" inches a side. It's true the hubs and parts will interchange but the axle width is shorter in relation to the DRW. Just swap front hubs and the complete rear and save $ over the arrowcraft stuff which is not as strong and will cause problems if you load it heavy, say with a gooseneck.
I'm using these fenders.
My front hubs cost me about $50 and they take standard 1 or 3/4 ton bearings.
Pm me or check my build if you need help. Good Luck!