Looked at it a little more. Version one is intended to be mounted on the outside of the original shackle box. This picture looks like you mounted it inside. This will easily make up 1/4" of the difference.
Here is the how the original design is intended to be installed.
http://www.naxja.org/forum/showthread.php?t=955999
I think that's it!!!
That's why I had to enlarge all the frame rail holes and trim the bumper side edge a bit to make it fit.
:doh:
Thanks Brian!!
I know what I need to do to fix this!!