clutch fan

Make sure your coolant concentration isn't to high, you should be around 30% to much coolant and she will run hot. When topping off with water make sure to use distilled water not tap water. Does your bottom radiator hose have a spring in it ? If not it could be collapsing when it gets hot which would prevent coolant circulation. If you are thinking a new radiator look into Cold Case Radiators, they make a awesome 2 row with 1 1/4 tubes and they are made in Hatfield PA not like some other companies that import theirs from china. I saw their radiators at the Syracuse Nationals this past weekend and I ordered one for my 68 Dart.