Which Dash Frame Fasteners (early A)?
Just took a couple out of my 66 Dart to snap a photo for you. The ones around the windshield are 1/2" long (under washer) machine screws with a 3/8" head and captured washer. The two at the kick panel are 1-1/8" long (under washer) with 7/16" head and large captured washer.
I don't have the dash pad nuts handy since I've eliminated my dash pad, but I believe they should be stamped PAL nuts like 65 Dartman said. If I recall, they should be 3/8" wrench size.