It loks like the interior quarter panels have pulled away from the door posts on both sides leaving a 1 inch gap between the panels and the door posts (jam). Is this common and is it caused by interior heat over the years? I am attempting to restore my 1988 Fiero Formula and this seems to be the only interior trim issue I have come up with.
The rear B pillar panels do have a gap between the edge and the weather strip, but it's not a full inch. There should be a screw near the top of the door just above the latch that holds the trim panel securely in the door jamb.