'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 don't know about 75 or 76 but my 74 had 5 mile an hour shock bumper brackets. I swapped them out for 73 brackets and then worked fine. 74 may have been an odd ball year, idk, but mine had holes in frame for either one if I remember correctly. At least I no I didn't have to to drill any new holes . Hope this helps!