Can you describe the shimming?
Mine seems to have way too much material in the center bracket so i can't even get the holes in the rear side of the quarter panel (the ones with the little oval reinforcers) to line up. We are at least 1/4 to 1/2 inch off and need less not more. I can't imagine pushing the bumper into place, it is a channel profile after all.
I'm wondering if I should swap the new bracket with my old one. Or just rechrome my old one as you suggest.
Arno, My experience with the 69 Repops were the same as you describe. I had to do a bit of shimming for the bumper to have an even amount of space between bumper and tail panel. The front was another disappointment. I ended up taking it back and getting another that fit a bit better. Now after being on for two years the danged chrome is flaking on the front bumper
I saved my originals and will take them to Bumper Boyz and have them refurbished. Dutch....Check out bumper boyz on the Net bumperboyz.com They are in L.A. But do travel to car shows throughout the U.S. You also mail your bumpers to them if thats what you want.