I wish I had seen this thread a year ago. I just happened to read a letter in HPP about the machined impeller vs. stamped. Probably written by one of you guys... I went to a Milodon pump now the temp stays under 195 pushing it 75-85 MPH. Before it would keep climbing until I let off it. I read somewhere else that overheating at idle speeds is lack of airflow thru the rad, overheating at hiway speeds is lack of coolant flow.
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