Sean from HemiFever suggested to me, I should put 180 degree thermostat in my truck after receiving his custom tune, to reduce knock. Has anyone done this yet? Does the truck end up running too cold in winter?Also, thinking about pulling my clutch fan off and replacing it with a nice clean looking electric fan. I am planning on using the factory shroud to mount the fan. If you have done this, PLEASE let me know what fan you chose. It looks like I could fit around a 20" fan in there. Just trying to eliminate trial and error.