I converted a Plymouth TC-3 (Dodge Omni fastback) to RWD. It cost me around $2500. All you need is a TC-3, the front subframes, wheel wells, floor and tunnel from a Fox body Mustang; a rear from a Dart, a 360, and a transmission; along with a few parts (depending on your likes and dislikes) ladder bars; and a few tools most importantly, a welding machine. I have driven it 48,000 miles and with the OD trans, I get 26 mpg, can cruise at 150 mph, do the quarter in less than 14 seconds (tires were too hard and slipped all the way - sticky tires will take care of that) Mopar Action liked it a few years ago.