If you converted to RWD and did it yourself it wouldn't cost that much. Rear end can be had from a junkyard, materials are cheap. The hard thing is the engineering of the motor trans remounting and the rear suspension. It would be a tough fun job for a DIYer/fabricator. I have a friend that wants me to convert his cougar to AWD with an x type drivetrain. It would be fun..but a PITA
