73' B3 340 Duster pro touring build

Forgive my ignorance but are those bumper brackets stock? I've tossed the super heavy 76 shock bumper mounts and I was going to make new brackets but if these are available stock parts ill buy some and clean them up.

Do they have front and rear brackets?

Thanks,

Riddler

They are stock off off a 70'-72' front bumper since I switched over to 71' stuff, I just made the stock slot longer to move the bumper in.