Use the largest stacked plate design cooler you can fit to the front of the car where it will receive sufficient airflow, especially with a higher stall speed than stock torque converter. Mounting it over the radiator face will allow you to take advantage of the airflow the engine fan will provide at idle and low speed, it wont be enough of a hindrance to the radiator airflow to be of concern and once you are rolling the wind takes over. Not having an electric fan is one less draw on the electrical system and one less component to be concerned with or pay for.
