This is a shot of the chrome headliner trim. In all the trucks I've parted out I've never seen headliner trim that was held in with clips in addition to the screws.

...and here's a shot of the roof panel. There were two evenly-spaced wooden spacers used, I'm guessing to help support the roof. They look too professional to be have been added by a previous owner...and in fact I doubt if the headliner has ever even been removed from this truck before:

So has anyone ever run into either of these things before?