Original vs Correct,, New Body Acceptable?

[FESTIVAL78]

Hopefully this pic will post: In my town ( Historic ) people with houses on the National Historical Registry are not allowed to tear the house down no matter how bad it is. The theory I suspect is that the person who owns the house is but a temporary guardian and the history of the house will exist long after the owner is gone. All the time I find these houses being restored but all that really remains are the threshold and fireplace footing..Did Paul Revere still die in that same house? Went to check out the USS Constitution this summer...20% of the wood is original.

Take this car as a great example. By all accounts it is the backup 67 Indy Pacecar..It makes the titanic look solid. It is in my eyes a car worth saving absolutely..What may I ask are the opinions of you guys.