Nash, Ive tried the flex fans. The only fan that ever worked for me was the seven blade with the heavy duty fan clutch and it still got hot 220+ in stop and go traffic. With the seven blade fan I could rush the motor up and cool it down in stop and go traffic. The problem I had with the flex fan was the more I rushed the motor the hotter it got. The more rpms the fan turns the less air it would pull because the blades straight out. Keep us posted on how well the new radiator does. From what I have heard that will take care of the problem. Joe