1972 Duster Build with my Daughter
So you have to get some sand paper and sand them down so they are the same as the original. This ends up being so far that you sand enough material that the pins will come through the back. This is not a problem.
Now get a paper punch and punch holes in the felt where the window has holes. As far in as you can...
The guides clamp in the felt, note this is before I knew I had to sand it down far enough to expose the pin.
Cut the ends a bit more than flush... I found this was a bit too long, cut them shorter.
I bent the edges of the channel corners out just a bit so they were less likely to snag the felt while sliding it in. I also did not have the sliders sanded enough here. I pushed hard and screwed up the felt. We recovered and sanded it down more. Lesson is the window should slide is easily all the way or you will crush the felt.
Success. You can see the ragged edge in the bottom inside here. We can live with it.
Time to rivet it up.