Though not everybody knows this, for a few decades following the 1960s, Carroll Shelby continued to build some of his most popular Mustang-based supercars. These “continuation models” sat in pieces in a warehouse until an order was put in. In 1966, Shelby built just four GT350 convertible models, and through the 1980’s put together another dozen or so.

Then in 1990 came this atypical “1966” Shelby GT350 convertible, which Hemmings Auto Blog reports isn’t officially recognized by the Shelby registry. However, the seller claims Shelby has unofficially endorsed this car more than once. Regardless, it holds the title of the “last” 1966 Shelby GT350 ever built.

The story is rather convoluted, and rather than get into the details, we will summarize it as sounding like a business deal gone wrong. This was essentially the last continuation car, initially given Shelby’s blessing but then left out in the cold. What sets it apart from other continuation cars is its reversed “running horse” logo and a modernized roll bar. Carroll Shelby’s signature is even on the dashboard. That seems like a ringing endorsement to us.

The asking price of $140,000 certainly is in line with other Shelby GT350 Mustangs, but the refusal of the Shelby registry to recognize it could hurt its value. The seller makes a concentrated effort to assure potential buyers that Shelby was on board with this project, and we have no reason to doubt him.

However, knowing that it isn’t a “recognized” Shelby, would you still be willing to plunk down that much money?