My experience, as listed in an earlier post. I live just outside Phoenix and have been fighting the overheating FE problem for some time. Perhaps there's some info in here someone will find useful.
To steam or not to steam, that is the question...
I haven't had much of a chance to drive the beast much since the radiator and coolant switch, but so far I haven't seen the high side of 210 degrees, whereas I was hitting 235 prior.