66 Dart, 408 runs hot. HELP PLEASE!

You did not mention if your radiator is aluminum or not. Although it sounds like it is. If not I have found switching to aluminum radiator helps a lot. Also you could mess around with your timing to see if it will lower the temp. However in my experience if neither of these work there may not be much you can do. Some times the engine just runs hot especially on motors that have been bored ( you did not mention if yours was).