I wished I were the original owner, but I am not! I bought the car 7 years ago in Hemet, CA. The owner before that lived in Thousand Oaks, also in CA, and I don't know the history of the car before that.
My S4 was built in June 1970, so it was one of the early 7 S4 cars. Later cars do have a slightly different bonnet , and different wings which include the turn signals (instead of having them fixed on either side of the scuttle). On my 7 S4 Twin Cam, the side exhaust, steering wheel, and K&N air filter are not original, the rest of the car is. The engine has been rebuilt to "rally specs" by Jay Ivey in Portland, Oregon, and I had a new wiring loom fitted. It is otherwise unrestored.
I have a lot of parts cross-referenced for the 7 S4, and will share that knowledge with any S4 owner who needs the info.
JLC in the Black Forest, between Colorado Springs and Denver.