HAVE A 1986 2+2 WITH T-TOPS, BODY SHOP TELLS ME THEY WERE FACTORY INSTALLED??? NO WAY??
I don't think so.
There were after market company's who did some mods like that, the car would be built by GM then shipped to these specialties companies.
Search Pontiac Grand Prix Questions
Pontiac Grand Prix Experts
Related Models For Sale
Used Cars For Sale