Actually, the rubber bumpers Autokraft used were too tall. In fact, cars with the hood scoop often had the weld seam in the center of the rear bonnet start to crack open as they put a bumper in the center right where the seam was. The combination of the seam and the pressure from the bumper often caused the skin to crack.
I trimmed down the bumper some of the cars I sold so if the rubber bumpers on your car looks like they were attacked with a razor blade....it probably was!