nytrdr24
+1y
i would try flushing the coolant system out, & putting in some new instead of the $65 fan clutch & save a few ducs so you & cup-o-noodles are more like distant friends. you have taken out the thermostat & aren't running one? radiator cap could be bad, if flushing & new rad cap & fan clutch don't do the trick, then you may be having head gasket issues, or if the truck still has the cats one of those could be stopped up causing all the exhaust to be routed through the egr valve, then raising the temp of the engine....
good luck!