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Thanks for all the reply's so far. It appears that this may be a build date issue?? Just for the sake of clarification, the build date on my car is Jan 71 and it does not appear that any screws were ever screwed into the cowl holes, but they do snap in ??



I agree with the build date change and Jan could be the change over depending on the plant. My 71 Super Bee, Oct 70 built had screw in only ones, there were no snap in tabs. I spent months finding a replacement set. Not an easy part to find. My Oct 71 built Charger has snap in ones.




to really figure it out could take some good research
it could be a plant/ date type thing.....
i have seen sheetmetal differances in panels in the same cars made from differant plants.

so where the supply of each kind of vents came from could matter.