Being from central NC and growing up in the 60,s and 70,s I can tell you that Carolina Blue cars were not rare here. A friend of mine had a 69 Z28 in about 71 that I am sure had the factory paint. Another friend ordered a Carolina Blue 68 L78 chevelle new and was well known here. It had a black vinyl top as did a 69 or 70 L78 Nova that was well known.I also remember a 70 Monte Carlo the same colors and a 67 SS Chevelle which I think is here and still owned by the original owner if I can find him. Another friend ordered a 78 Monte Carlo Carolina Blue with a white vinyl top which he sold later to brother. Carolina fans here are serious fans and during the 70,s the color was not a strange thing to see. If I locate L. Steele and his 67 ss chevelle I will check the paint code and post it.