Well I received my water pump with a cast impeller and bent the divider plate ..040 thousandths (less than 1/16th) and installed it and did nothing else and started it up and let run 30 minutes and it never went over 180 degrees (prior to change in 15 minutes it would be 210 degrees). Took it for a spin and never got over 180. I am going to put a 160 high flow thermostat back in it and fill with anti freeze. I want to thank you guys for all the help you turned my way and very much appreciative as I was at a loss. THANK YOU