1965 Dodge Dart 270 wagon

I also found a lower red plastic moulding to be added on the inside on the lower part of the windshield gasket. Was this standard on all cars? I've seen it on a red interior Dart 65 once.
They may have been standard on 270/GT and 200/Signet/Barracudas. I’ve got gold ones from a Signet ‘vert and Barracuda and a blue one from my wagon

Edit: and yours is in much better shape than my sun-warped plastic moldings