My comment about verifying the integrity of a car before buying it also applies to excellent restorations performed by well-known restorers. I could tell you some very surprising stories. A non-restored car was offered on eBay recently that duplicated the VIN for another car that was sold at Barrett-Jackson in 2010. The two were obviously not the same car. I could not get a convincing explanation for that, but to my knowledge nothing changed.
Be careful! And be aware that the BJ8 Registry currently documents details and history for more than 54% of total BJ8 production (9,575 of 17,712 cars built). That is a database available for checking advertising claims and vehicle history, if you care to do so.