front discs on the rear

The only parts from the front brakes that you could really use, are the calipers, the rotors are a totally different type than you would need on the rear as well as hoses and stuff. I have no idea what type of bracket you would have to make to use the factory calipers on the rear, or of it would even be a wise move due to piston size/volume. They also may be pretty bulky. There are cheap rear disc kits avail on eBay, in the $300 range, and there have been several threads a it them recently. That's where I'd look, the money buying and adapting parts to work would reach that price quickly

Joe