My '69 Fbird runs at 180 and above. It has even come close to 240 on a hot day in traffic. Does anyone have any suggestions to fix this. I've considered a low temp thermostat, but I'm not sure if that'll fix it on hot days. The top of the radiator has been enclosed to keep the airflow going to the radiator. Maybe their is a radiator out their that works better than the stock one.