He comes straight out and tells you it's a reproduced stamp. I imagine the winner won't divulge this when he turns around and sells it. Someone file the VIN. It does say it's a 73 motor so I guess someone looking for an LS6 would see this clear as day.
http://cgi.ebay.com/ebaymotors/Chev...hevelle-SS-LS6_W0QQcmdZViewItemQQcategoryZ6164QQihZ009QQitemZ190125108479QQrdZ1
http://cgi.ebay.com/ebaymotors/Chev...hevelle-SS-LS6_W0QQcmdZViewItemQQcategoryZ6164QQihZ009QQitemZ190125108479QQrdZ1