I just bought an NOS rear license plate bracket for my '56 Caribbean, however, the mounting holes on the bracket do not line up with the holes in the bumper. Bumper holes are 2 7/8" on centers and the bracket is 2 1/2" on centers. The NOS bracket bottom plate that mounts to the bumper has an approx. 45-degree angle also. My original bracket was a regular right 90-degree angle. Question: What year or years does this NOS bracket in the attached photos fit? I won't work on my '56.