need help removing the rear bumper of my '69. i started taking the tail lights out but realized they won't come all the way out until the bumper is off. i removed the 6 or 8 on the bottom, but it looks like there's four big bols that run along the top of the bumper. I can't access the nuts from my trunk, and i can't find a place from behind the bumper... does anyone know how to remove those bolts? thanks!