HELP!!! Immediate Help Needed! Rear windshield clips

My 73 Swinger was a vinyl top car but the clips are screwed on! I would just cut the rivets off with pliers and drill small holes next to them for the screws. You want the clips to be tight!

By the way, supposedly the gasket is different for a vinyl top car. I had my original gasket reinstalled and everything, including the trim is tight. I don't have a vinyl top anymore.