From the overall sound of things the desert cooler with my Efan is going to be a modification party. I went with a new 2.25 core, a 180 tstat, and possibly a new a/c condenser sense I got all that out the way. The more I search and read it looks like a 10 or 12" pusher fan on the AC condenser is going to help the idling in a parking lot with the AC on. I also had James bump my idle to 800 to see if that helps, I was idling around 630-725 with all accessories on and seeing less than perfect charging voltage.
JD, did you need a new tune for the 180 vs the 195?