67-72 core supports are different than 73-76 if he is restoring. The difference is the location of the radiator mounting nutplates.
I bought a 22" aluminum radiator for 73-76 A body because of the inlet, outlet locations were where i needed them. None of the radiator mount holes lined up to my 67 core support. No problem, i made my own radiator flanges from .125 aluminum sheet, and modified my new aluminum radiator it to fit my core support..