65 b'cuda windshield install--help!

Professor Fate said

Lockstrip. It goes in the channel in the gaskets.
63 64 65 66 Mopar Dart Valiant Barracuda Chrome Lockstrip | eBay

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That's actually not the correct lock strip, but it does fit, and no one reproduces a visually correct lock strip. I think the ebay lock strip is an OEM Chevy truck lock strip. But it fits, so by all means use it.