'65 Barracuda Interior moldings under rear window
At least on my '65, you could just leave those corner trim plastic pieces off and never know it. Each side on mine has 2 holes same size as "vent" holes in center. 4 more plastic plugs matching center plugs and you are good to go. I have not yet decided on mine as it is disassembled. I think a corner on one of my trim pieces broke as well.