I am still having engine overheating problems, I have replaced the radiator, water pump, thermostat, the fan shroud is sealed up good. the timing is set right. The only thing left i know of is the fan clutch, but how do you tell if it could be bad? When the engine warms up I can get a few rpms up and the fan keeps turning awhile after i shut the engine off. This part sounds crazy but, when i am on the highway is when it overheats but when i slow down it starts cooling off. hhmmmm. Thanks for the help!! Life is grand in K-5 land!