Right now my only cooling mod is the AFCO HE. With the '13 TVS, that is not cutting it anymore. My MPH at the track is absolutely awful even though my car put out good HP on the dyno. So now I want to spend my next mod money on cooling. So far I am considering an upgraded heat exchanger, bigger resevoir, and the 170 degree thermostat. Am I missing any options? Which one will give me the most bang for my buck with the knowledge that I already have the AFCO?