I can see some work was done on the A pillars and around the windshield, that looks like a twisty-turny curvy bit of fun. Lol
That A-pillar is a freak show, ain't it? Deadly in a crash, too. Its original, see how the Pontiac is the same way? It has a B post whereas the Pontiac is a hardtop.
All Grand Prix, all the time. 69 Model J, 99 GT & GTP coupes. All junk, haha.