Don't know if it's anything like my Barracuda's windshield gasket, but if it has the plastic chrome strip in it (might not look like that anymore, might be black or gray), then there's a chevy side moulding that fits perfectly.
It depends if the trim looks like an F or not. 67 Dart's take an F trim. I found a Mopar guy on Ebay that says he has a GM Trim that will work with the Mopar Corner pieces. Hopefully I will know soon. I left the guy a message.