I know this subject has been beaten like a rented mule! I have tried everthing i can possibly think of? i have a good three core brass radiator,the correct vaned water pump,the divider plate clearance is correct,no thermostat, (no diffrence with thermostat) fan shroud,upper and lower baffles,18 flex fan located 1/2 into shroud. does'nt matter what the outside temp is the car runs between 180-190 around town, as soon as i get on the freeway and hit a steady r.p.m of 2800 it just starts to climb slowly and never stops climbing? I've also tried diffrent pulley sizes with no change. I'm a converted chevy guy and just am not use to these temps so how hot do these engines run or how hot are they designed to run?