'73 bumper brackets on a '76 ?

I have a '74 that does not have the shock bumper in the front, but has it in the back. It came factory like this! I want to replace my front bumper on my '76 with something similar, and lighter :)
Crazy ain't it? And mine's a scamp, that may have something to do with it also. And as I remember it now my front bumper came in the trunk so maybe the PO had already bought a 73 bumper?