AMD 67 Barracuda Quarter Panels

1967'cuda, The areas where you marked with yellow on your chargers 1/4's are near the same areas that factory original 1/4's have small round-ish type slits. IM guessing with production tolerances the way they were back then even the factory needed a little "adjustment" room as all these cars seem to be just a little different here and there. That must be the explanation for some having a perfect fit and others needing the slight adjustment..... my thoughts