UPDATE the car runs much cooler with the factory pump. I put about 100 miles since changing it and it definitely is more predictable from a cooling perspective. I did have to reduce the vacuum advance and overall timing to reduce ping. I conclude in my application that there is some trade offs but in the end I would rather not worry about it creeping into the 200 plus range. I would think I could get this to work by changing the thermostat, but I feel That electric fans are a better investment. The setup today fluctuates between 175-190 and feel I can level it out around 195 with airflow. I'm waiting for a hot day to do more experimenting.