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

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.
Yes there is black strips from the factory. Nothing fancy. I have to relook at one I have here somewhere.