Hopefully a member will be able to help you out on this. I will be of no use and I apologize for that. I remember some from the 70s and they were mostly aftermarket. There was a big fad to put them on 70 and 80 model cars. Lots of companies offered them. But the factory also did a few. They were sent off to an off site vendor to have them modified. I believe they were only offered with a vinyl top. After the sun roof was added the vendor co. would return it to the factory to be finished. Or at least thats the way I remember it. And that memory is real cloudy. Tough getting old
