Start with an exhaustive Tech archive search here on "hot" or "overheating". A very common problem on these cars that has been discussed a lot on the board over the years. It will give you some ideas.
In your case, I'm going to say timing, running lean or your factory baffles that channel air into the radiator are missing. You are probably going to have to define what RPM range you are having the problem at.
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
