A few of my friends and I figured this out, after a lot of searching.
I got a great deal on JK Rubicon take off tires, and needed/wanted a cheap 17" steel wheel.
Please read up on the difference between 5x4.5, and 5x115, if you decide to run a similiar setup. Do so at your own risk.
300c, Challenger, Magnum (LX Platform) 17x7" stock steel.
Some sources say 5x4.5 others list them 5x115. That is 0.02" difference, so run these at your own risk!!!
71.5mm center bore. Seats PERFECTLY on the hub, better than the Cragars I have.
4.5" backspacing. EDIT 5/24/15 - Guys are telling me it's 5" backspacing. SORRY
255/75r17 BFG Mud Terrain (measure a full 32")
Front is about 1/2" tucked, rear is about 1" tucked in the fender.
Center caps are stock XJ, the wheels needed the mounting holes for them, but even they fit great.
The combo is around 67 pounds tire & wheel.
If you can't tell, I'm really happy with how this came out.
You heard it hear first, cheap 17" wheels, and cheap/light 32" mud terrains, I have just over three hundred into it, including mounting & balancing.
I'll get more pictures today, I finished up late last night.