Not all brackets will match your bumper filler,if your going to use a 73 bracket you have to use the 73 bumper filler. The 74 bracket holes do not line up correctly with a 73 bumper filler, and likewise the 70-72... chopping and welding these to fit would be a nighmare..you see them on ebay but choose the right bracket for your application, each bracket also give you depth of your bumper into the inlet shape of the quarter panel.