The aluminum front bumper brackets are really light. They match up to the factory frame bolt holes about perfect.
They do fine with a light weight fiberglass bumper, my bumper is from Glasstec, but there is no way the aluminum brackets would support a stock steel bumper. The vendor that I bought the aluminum brackets from makes them for many models. I bought them at the Indy Cylinder Head show here locally. If you are interested I could dig the contact info out.