"Anybody can restore a classic. But it takes balls to cut one up." I saw that on a T-shirt at a car show one time and it always come to mind when someone wants to ensure a buyer keeps a vehicle "all original", or maintains it a "certain way". Once money changes hands and titles are signed... all bets are off.
Everybody has their own idea of what they want in an older rig. I met my wife's boss the other day and we went out to his shop and he showed me a very cherry 1968 Camaro RS/SS. I made the comment that it would make a fantastic drag car. He was horrified.
Again, I don't care all that much for Camaro's but they make great light weight race cars. So views differ no matter who buys or sells a rig.
Gary