The 3rd digit as an "8" designates delete . The V6X for example would be the longitudinal R/T stripe (in black) and the V7X is more of a pinstripe . V5X would be protective body side molding . V8X used on B bodies ,or V9X (70 Challenger) would be a bumblebee type (transverse) stripe .
Last digit is the color of course , I just used X(BLACK) as an example.

Greg