I'm replacing the driver's side quarter panel on a 68 dart. There is a little L shaped piece that goes in the bottom corner of the back glass . My question is does it go on top or underneath the quarter? I've tried it both ways. Thanks Jeff
Mine was a 72 but I think they’re the same, is this the bracket of which you speak?
If so the quarter should go over the bracket and it will sit inside the quarter, I installed mine after the quarter was fitted and welded in place. Bracket strengthens and prevents cracking in the corner.