Just a suggestion....crank it up and let the engine get up to normal operating temp.....shut it down and run your hand against the inside fins of the radiator.....the top should be uniformly hotter than the bottom. What you're looking for are cold spots that signal clogged passages.
Also check the bottom hose and make sure it has a wire expander in it. They've been known to suck closed, causing elevated temps and the dumping of coolant.
Dave
Last edited by Fla54Chevy3100; 02/18/2009 11:57 PM.