I have a 69 Road Runner with a 440 4 barrel. Not the original engine (383) but installed before I purchased the car. 406 HP with MSD ignition. Had a mechanic install power steering and A/C. Recently installed a 26" radiator with electric fan and shroud. Drained anti-freeze and put in water wetter and distilled water. Let car idle for about an hour and a 1/2 in hottest part of the day in Houston Tx. Very hot. Temp got to 200 and stopped. Turned A/C on and temp went to 220 before I got scared and cut it off. Does anybody have idea about someway to get temp down. Thanks