If all else fails, an aluminum radiator will probably solve your issues unless you have too much gunk built up inside the engine water jackets that is not solved with a good flushing.
You are not alone, these cars have a reputation for running hot which is why the factory installed all the baffling plates (upper and lower) and rubber fill pieces to direct all the airflow through the radiator that they could.
2012 Mustang Boss 302 #1918, Competition Orange. FGF replacement 2006 Mustang V6 Pony, Vista Blue. Factory ordered. 2019 BMW X3 (Titled to the wife, but I'm always driving it for her. So I'm claiming it) Old projects, gone but not forgotten: 1967 FB 400, original CA car. After 22 years of work, trashed by the guy who was supposed to paint it. I had to sell it. 1980 Turbo Trans Am 1970 Mustang fastback, 351C 4Bbl, auto 1988 Mustang GT, 5 speed 1983 F-150 4x4, built 302 1994 Chevy K2500 HD 4x4, 454 TBI
