A lot of years ago I bought a piece of rear trim for a 70 Challenger. It was NOS from a stealership and it was the piece that goes from one side to the other just above the taillights. It was a 1/4" too long but it fit my ragtop 70 Challenger perfectly. That's when I started looking for body damage and....could not find any. It was my first foray into factory body dimension tolerances.