Found another '66 Formula S but I have some doubts...

The VIN is only on the drivers door pillar, the certicard, the build sheet, and the IBM card at Chrysler. The fender tag will have the shipping order number which will match the radiator support stamping and usually a stamping under the rear cargo deck. If it's a true Formula S, there will be a 7 under the F on the fender tag. Maybe post a photo of the fender tag?