Yep, you have been mislead. No one kept track of any combination of options, and no one has been keeping a running tally of how many have been destroyed over time. All GM has is original invoices and all anyone can do with some of that data, is to extrapolate approximate numbers based on those often incomplete records. Anytime you see "My car is one of seven ever made with a 350, t-tops, and pink titty-tassle hand grips" the perpetrator is generally engaging in a flight of fancy. Take it with a grain of salt. Besides only the "touched in the head" crowd, and the NERDliest of NERDs cares. Best to just avoid those types and enjoy yourself regardless of the rarest of the rare collector status.