Hello gents I’m New to the forum my father purchased a 67 Buick gs 400. It has a 430 in it from a 67 wildcat the heads were re done it has an aluminum intake manifold Rochester 4 barrel, headers and a mild cam in it. My question is the car constantly runs hot 240-250 degrees. It also has an aluminum radiator installed and a 16o thermostat. Any suggestions to get it to run cooler? Electric fan would prob work but it’s not really solving the problem. Only other thing we can think of is a high flow water pump. BTW car starts fine when hot so we ruled out timing.