There is a listing for sale on another website of a proposed PHS documented 1965 GTO. There is a photo of the firewall data plate. My humble understanding is that the number and letter "5N" designating the GTO option would be on the "ACC" line. The plate in the listing only shows 5 numbers in succession and no letters. How does one reconcile the lack of a 5N and supposed PHS documentation? Did a different plant stamp something else in lieu of the 5N, or may this be a suspect listing?