jhenty wrote:if you have to ask what it will cost or if its possible it means you can't do it, bottom line. Sorry.
Damn, you beat me to saying it. Those who know how to do it would not bother. (Sorry)
If you want a sleeper car that's easy to make a rediculous swap, try a Mazda Miata. It's already RWD and Ford V-8s have been shoehorned in place. Put in a Cobra independent rear suspension and a custom stubby driveshaft and you have a killer pocket rocket that can be done on a budget.
You still need to stiffen up the chassis, but atleast it's possible. It's too much work for the return on investment to try and convert a heavy FWD unibody to a RWD with a high torque engine.
Good luck in your quest. Not meaning to be a smart donkey, but spend time looking for a project that someone else has already done before. Talk to that person and learn from their mistakes and experience. It will be much cheaper in the long run.