I really fail to understand what makes people want to change the drivelines of a car. Is it bragging rights? "Hey, I spent $40,000.00 on my civic and now it's a stable, RWD car with a 350 Chevy." Or better yet, "Hey, I just spent $500.00 making my civic RWD with a 350 Chevy and it has $35,500.00 worth of mods that I need to do to it to make it stable and reliable."
I guess if you're Mr. Trump and have nothing but time and money, then it would be something to do just to say you've done it. For most of us that are serious car builders, we let the FWD cars stay FWD, RWD remains RWD, and AWD stays AWD. We invest the money into making the best of it rather than trying to make a Ferrari out of a Geo Metro. When we want to play with RWD or AWD, we go GET a RWD or AWD car and fix it up.
Well, I guess I don't have to understand it... it's your ride and you can make it a disaster if you want.