I have changed radiator (3 core after market), thermostat, water pump, hoses, replaced fan clutch w/solid mount, electric fan comes on with ignition.....still I have a cooling problem!! Over thirty miles on the freeway, she over heats....Block??? Heads???
With all that stuff, it should run like a top. Did you flush the block after making all the changes? Sometimes, the engine has so much crap in it that it plugs the new radiator.
