What I find interesting about this discussion is how the paradigm has changed with regard to the 69 Z. As a teenager, my recollection was that while I did see Z/28's their sightings were much less frequent than say SS Camaros and 396 Chevelles. The Chevelles seemed to be everywhere. I can only remember seeing 1 Z/28 RS. In fact, the mythology back then in my area, was that there was no such thing as a Z/28 RS. When I bought my Z RS in 1982, a supposed "friend" of mine had the need to call me and inform me that mine mine had to be a fake, since "they never made it". Maybe someday there will be enough data to do a vaild statistical analysis, like has been done for the 67's.