I have a 1973 Mach 1 Mustang that I am working on and the old rubber bumper is all tore up. I really want a chrome front bumper but Ford never made them for the 1973 model will the 1971-1972 fit with little or no modification?
Aside from the fender issue, the mounting for the 73 is way different than the 71-72 due to the large shock absorbers that are sitting under the 73 bumper. The 71-72 has thin brackets with different mounting. There is also a valence under the chrome bumper you will need to get that also has mounting brakets with the turn signals.
With a little patience, you should be able to bend some metal to adapt it.