The '67 used a chrome plated plastic locking strip that snapped in the middle groove of the rubber. Those in the know please correct me if I'm wrong here.
When I bought my 67 cuda I did not know anything about the rubber, plastic locking strip, and the corners you have to buy in order for it to look original. The previous owner just had enough locking strip installed to keep the gasket tight against the glass. I saw it and was wondering what was going on but didn't question it enough to not buy the car since I got it at a great price. However when I got the car home and started working on it that's when my questions got answered about the locking strip, etc... on FABO. So that's when I made up my mind to convert it over to 68.