What is the difference? Is the hole spacing incorrect on the reproduction bumpers?
As far as I can tell, the hole spacing was the same. The shape of the bumper brackets was the issue. I bolted the OEM brackets to the repop bumper and it was obvious the brackets were not going to fit on the frame as they weren't parallel. I tried pulling them together and actually put a small kink in the repop bumper (which was not spring steel like the OEM bumpers are.) For some reason, the repop brackets were shaped to fit the repop bumper correctly.