I am running a 426 bored 60over. on the highway it runs 180-185 degrees. My problem is around town in stop and go traffic. It will heat up very slowly heat up. Living in south central florida, I have run it up to about 215 and then I start getting paranoid about heat. I will find a side street and go and it cools down after about 3-4 blocks. After reading about this evans stuff around the web it seems to be pretty good. It seems to have about an 85-90% approval rate in many different forums. Any advice or opinions is appreciated from the mopar guys. The car does not have a fan shroud and has about 250 miles on a complete rebuild. Also has both original and switched electric (2200cfm) aux. fan which i use. Original radiator rebuilt with another core row added to it. --- thanks