roll back odometer?

When I got the Demon, it had no engine and the speedometer did not work. I replaced both. When I sell the car, I will specify that "The speedometer read 68253 when replaced by a rebuilt unit reading 0.0 miles.". I've been told that is a satisfactory declaration on a title form by my jurisdiction. Don't know what you'd need to do in Arkansas. I agree with the point made by others here that is legally, ethically, and morally wrong to knowingly re-set an odometer and use the lower figure to represent the mileage of the car.

If you're trying to figure out whether the mileage on your odometer is 66000 or 266000, try doing a title search. You will have to inquire separately to each state that the car has been titled in. Understand that several states did not have title laws back in the day, which makes for a dead end for the search. Even today, Alabama does not require a title on a vehicle more than 35 model years old. (IIRC, AL was the last state to enact a title law.)

When I did a title search for a 66 Dart I restored back in the 90s, I found that the 97k on the odo was 297k. Each time the car was titled in a state, a mileage declaration was made. When the mileage in LA was 93k, and 2 yrs later in TN, the mileage was 28k. There was no speedometer repair/replace declaration, I think it is OK to assume the odometer rolled over. In my search, I found two such occurrences, one when the state changed, the other when ownership changed. Most states charge for the search, but I was provided a copy of the title application. TN blacked out the owner's address and phone number.