Thanks Hemi. I've successfully removed the vinyl top, but haven't gotten to the drip rail moulding yet, thankfully.
For vinyl top replacement, this guy has a pretty good tech write up: Vinyl Top Install
In it he mentions these little clips, which my car had. After removing the nuts from the spring clips, you can slide the trim off of these little plastic clips:
After 35 years they can get a little dry and brittle so a few of them broke. He also mentions that these little guys are no longer in production, but Chrysler clips are and are similar enough. I found some here: Northland Fasteners
. If you scroll down you'll see some clips similar to what's on our cars. You'll also see spring clips if you break some of those. I'm not sure exactly which one to use as there are multiple ones that look the same. They are affordable enough to buy different types and send back the ones that don't work.