I used fishing string to remove the ones on my 87GT t-top. I just used the string to cut through the caulk as I slid it under the pieces. There are supposed to be six clips holding those two pieces on, but mine didn't have any, just lots of black caulk. As far as I know mine have never been removed since installed by a C&C authorized installer. They did use a rivet for the one that is on the bottom where they meet in the center - the upper one covered it.
I went slowly and hoped for the best and didn't break anything.
You still sell reproduction end caps?
[This message has been edited by SCCA FIERO (edited 10-25-2013).]