In addition to the location Jeff mentioned, I find those also on 67 upper console mounting brackets, 67-68 fastback rear interior panel brackets, 67 dash pad where attached to the windshield structure, and a few other places. I've got a bunch of spares, PM me if you need one. I'm sure others here have them and would do the same. Phillips head, disproportionately large, sheet metal screw. I would have to look again to see if it is self tapping.