HELP0... which direction is better?

HI i have a 73 gold duster with a snake skin top and a manual sunroof. The thing is that the body is really really rusty, i mean both full quarters, all trunk floors, full floors inside , some frame fixes, does it ruin the value if i were to cut the top off of mine and put it on a different body, or is it better to just bite the bullet and replace all the body parts? I dont want to ruin the value of the car at all.:banghead: