On my 1972 dart with 440, i fought overheating for years sitting still or low speeds. I had the original small block radiator and shroud, a flex fan and no thermostat. I finally got tired of the hot running and did some changing up. I installed a nice aluminum cold case radiator with the big cooling tubes, used the original shroud again, and found a factory 7 blade fan, AND installed a high flow miloden 180 degree thermostat..it was the best thing ive ever done to this car! It will sit and idle all day long in 100 degree Tennessee heat and never go over 180 degrees and as long as the car is moving it drops down to about 170. I wish i had done all this years ago!
