Did not see which Dart you have and what condition.
On my '64 GT the rear window trim (4 piece) had about 20 clips which were screwed into the body. Most were rusted.
The rear window and rubber had to come out first.
Replaced new clips, rubber and new [used] glass the old decided to shatter only after one day of being replaced= was looking ok!!= They do that sometimes. I am told they, like me, do not like change and tension.
My front has only rubber with a plastic chromed insert = replaced glass new [so much clearer],rubber and insert.