67 Barracuda headliner install
I just did this on my '68. On one side I already had the roof rail trim off so it was easy to pop that trim off. There is only the one screw at the front. On the other side, the roof rail trim was still in place. I was able to use a bit of a twisting motion to remove the piece. I'm sure that's not how any book would say to do it, but it worked. ;-)
Good luck.