Unlike cars of today where only half of the car is designed in Clay, then digitized and the other half is mirror imaged by the CAD operator, cars from the Sixties were made from a full size Clay where the side was made in Clay and the other half was duplicated in Clay, sometimes by a different Clay Modeler! It is not uncommon for one side of the car to be up to 1/4 inch longer than the other side of the car!
Darnel