Thanks a lot! Yes, the rearend is a narrowed Dana 60. It measures 46" housing end to housing end. IIRC it makes it 51" or so drum to drum. The wheels are 15 x 10 w/ 4.5" backspacing. The leafs are moved into the frame rails. The tires fit like a glove. I'm actually planning on running 315/60/15s. I moved the rearend back .75", so the front of the tire doesn't hit the wheelwell.