I believe that a more complete answer was that Cars & Concepts cut the top off and made the convertible as a subcontract to Ford. Remember that convertibles were coming out of hibernation since 1973 for the Mustang, and the line was not set up for it. I think Ford took back in house in 85 or 86. That is all based on memory, a little fuzzy on the details after all these years. C&C did some of the Chrysler convertible mods also (K-car). I think they did T-Top stuff in the 1970's which put them in the position of helping Ford bring the convertible back. Once it was a success, Ford took the work back.