there is a black & white 1970 Road Runner press photo - close up of driver's fender with dust trail strip - It's "up-side-down" spank

the stripe isn't supposed to be a straight line - here is the layout per the above instructions grin it starts in the center of the 1/4 scoop then moves up & over the wheel well opening

moparts 1970 Road Runner V6Y dust trail layout.jpg