Working on locating the original owner of my 69 Z28, tracked it down to the person that had it in 1970, one more person to find ! It's not easy but through a little detective work on my own I was able to use the internet to do all of my search. Try a website called Zabasearch I found everyone I was looking for because of that site, (one person at a time). Start with the last known person that owned it and search for the them on that site. Good Luck