I have a 1967 Ford Mustang convertible with a 289 engine, and a 4 barrel carb, 160 degree thermostat. This car overheats no matter what i do!. i have a new 6 bladed fan in in it, the radiator i think is only 2 core, but the over heating does not occure when im idle, i can be going down a road at 65 and it will not cool down. what do i do? I am ripping my hair out over this problem. I cant even drive to work without having it overheat. Some one tell me how to cure this problem without me spending a ton of money.