John - A 1969 Z28 that was built at Van Nuys sold recently on BAT and the seller did post a lot of information that you may find interesting:
http://www.camaros.org/forum/index.php?topic=20814.0I live in Palos Verdes, CA and I have a friend who owns a 1969 Z28, but it was built at the Norwood Plant. We have a monthly Cars & Coffee that has been going on for over 10 years, but my friend's Z28 is the only one I've ever seen, although a number of replica Camaros with Z28 emblems have shown up. My oldest friend had a 1968, 1973, and 1978 Z28, but he stopped buying them when he joined Toyota! - Mark