66 Catalina runs hot
I have a 66 Catalina convert with a 69 Pontiac 400 and automatic trans. The cars runs hot when I drive it slow for a parade. I have changed the water pump, recored the radiator and installed a high performance thermostat. I have checked the timing several times and installed an auxillary electric fan. It seems to run fine and at about 200+ when on the highway but when I slow down and have to idle it starts to get hot fast. Anything else I can try? There are no collapsed hoses and I have flushed the engine several times.