69 cuda rear valance

JTG said
The rear valence is flush, but another question, does it have a visible seam showing under the paint where it meets the rear quarters?, or should it be seamless and look like the rear quarters and the valence are all one solid panel? How did it come off the assembly line?

You should be able to see the seam all the way from the tail light, down to the bottom of the car.

They weren't doing custom panel fitting on the assembly line.