68 Barracuda windshield corners

You're talking about 67 windshield gasket. 68 and 69 had stainless trim in which is a different gasket. If you have a lock strip that is in your gasket then you definitely have a 67 gasket.

This is what they look like. There is a place "somewhere" that has them but I can't remember where. Might can call this place.

Mopar A Body 67 Barracuda Dart Valiant Windshield Gasket Seal with Locking Strip Trim