The more I think about this car the more BS it seems. Really.
Reason I say this is that GM PAID that company for *** number of cars. They had to be up to snuff to GM specs, and if they weren't, they didn't deliver them. If this indeed happened, someone would have lost their job, and every car magazine out there would have covered this with the higher ups.
I don't believe this horseshit about running out of parts and then building a half-*ss car. Planners don't plan job orders or send the cars through if they don't have sufficient quantity of all the conversion parts on hand to do the job orders. That's part of the production process long before the cars arrive. If they ran out of key parts, they ran out of cars. The fact that the car may have left the conversion facility as an aeroback, and then was
reconstructed later to a notchback by someone else seems more plausible.
Documentation isn't noted with a pen and ink addendum to a request. I have never heard of any of the GM historical entities that dealt with helping owners ID their cars send a mommy note to explain how they ran out of parts. If that were true, they'd have documented that with a typed letter on letterhead.
GM does NOT run out of parts when they produce cars. This doesn't mean they don't have production delays or cancellations DUE to lack of parts and such (the mid 80s Corvette rear fascia debacle comes to mind) but they have never to my knowledge have simply sent a car missing key parts to the dealership and put their name on it. I do grant you that quality back then made for some poor *ss examples, but something like what is being claimed just didn't happen.
Someone change my mind. Give me some documentation, interview from GM press release, etc., or official something to tell me these bastardized cars were supposed to exist.