When I had my head lining out, I don't remember seeing the mechanism. It is kind of in a tray welded to the roof. I think, to remove the sunroof there are several small screws that you get to from the top once opened. These are normally rusty though so expect a bit of ball ache.
The black was Ebony Black, and I believe it is a gloss colour. Various rumours as to how many were made, with some people saying as low as 89 left in 2wd. I'm certain that Crystal Blue was the rarest colour in the 2wd from the factory.
cheeRS