The 66, 67, and a few other early year Hemi cars came down the assembly line with the Hemi Engine tag wired to bare unibody shell to let line workers know to add Hemi components like Torque boxes to the unibody as it moved down the line. After paint the tags were pulled off and usually tossed inside the car before the carpeting was installed where most remained. Occasionally they were installed on the inner fender with the other tag like the bronze car linked above but this was not the norm.