'73 bumper brackets on a '76 ?

I know the bolt pattern is different. Has anyone used these? Looking to get rid of the impact bumper shocks/brackets. Somebody done something else to eliminate?? Or am I left to create my own brackets? I've already cut the brace out behind the bumper. I want to keep the factory chrome bumper, just shed the weight behind it.
I have a 76 Dart Swinger and I removed the bumper pistons and cut them down a couple of inches. This moved the mounting brackets back and pulled the bumper in about 1.75". I also cut sections out of the steel support in the bumper to reduce weight. The bumpers are now pulled in nice and tight to the body and it looks 100% better.

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