'68 "Spring Special" Inner Plastic Grill detail Tips/results, (cont. from 7/18/18)

I also have NOS hardware for the cast gills
I only have a couple sets left

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Are there long black plastic strips under the cast gills too? Like anti rattle or to spread the holding load out. There’s some slots under the molding for them to fit on. I had some with the moldings... they look factory, but I can’t prove it.