Try Newspaper Archive.com too - The Wichita Falls Times seems to be searchable there. Maybe a private individual bought it from Pistocco and re-listed it a few years later in the Cars For Sale section, maybe the phone number is still good and they still have insurance info. Maybe Pistocco sold/traded it to another dealer who actually listed VINs in their ads. Or maybe by 1977 Pistocco did too and your car is in one of their ads. These are from '72 , but no VINS.