As far as the 1968 GT/CS is concerned, There were 4,118 cars built with the GT/CS package. We currently have 1,511 cars in the Registry, which is 27% found. There were 215 GT/CS cars built with the S code 390GT engine, which 76 are registred, which is 35% S codes found. We are finding cars every week thanks to the Internet, ranging from rusted out barn finds to fully restored cars. So, this number will certainly rise as time passes. Not the 67 S code stat you were looking for, but certainly a "Special Interest" Mustang. Mike ps. Just a note, I know a man in Sacramento, Ca. who owns a Mustang shop who told me he has personally scrapped four (4) GT/CSs over the years, unfortunately, he did not have a record of the VINs for those cars.