It might be, my memory is garbage with the interior stuff because it's been so long since I tore my car down. I have pics saved from the junkyard though when I pulled the spares. I'll report back.
Hey, who remembers doing a headliner, huh? It's an unremarkable, low return on investment type of job that hardly anyone pays attention to. It's like those umbrella clips on the rear deck panel for the non-vinyl top cars. NOBODY remembers. Unless you just did one in the near recent past. At least there are some little divots in the rear upper panel to help guide where the clips go. Same for that rear exterior panel for the umbrellas. I WANT to say on a hard top you have 3 rears, 3 on each side of those screw in clips, and there's 5 of those front windshield molding clips.
If 5 is correct for the front, then GM faked us out. They usually sold those front clips 15 to a box. And if you could do 3 cars with a box, I'd be amazed if it worked out like that. Normally they do the hot dog / bun ratio problem where you have to do higher math to equal out the number of hot dogs to buns.