I really don't have to explain myself, and you should be able to think about why this is stupid, but since you asked.
I take you don't know any RV'ers that pull toads and know how much of a PITA it is just dealing with a FWD vehicle let alone a RWD car that you now have to deal with a driveshaft? I'm here to vacation and RV, not dick around with a driveshaft on a classic car!
I wonder what his classic car insurance will say if something bad happens to said vehicle being towed and not being driven? Would they even allow that? You're just asking to screw yourself if something happens to the car!
You do what you want because people do stupid things like this, but I sure as hell wouldn't do it, even if you paid me 100 times what my cars worth! Why do you think your insurance rates are so high as they are to begin with?
It needs to be either a 4WD on all 4's, which is a "flat tow" and not trailered, or a FWD on a tow dolly!