I'm looking at three different water pumps; Tuff Stuff, FlowKooler and Edelbrock. Does anyone have any experience or comments on any of these? Or is there another to consider? Whichever I choose, when autocross or especially track days come around, should I change the pulley ratio for that? The car will see some street use such as back and forth to cruise-ins and car shows and local autocrosses. My car is a '65 Mustang with a stroked 351W, four speed, 3.50 gear and aluminum radiator with electric fan. The engine isn't complete yet but will be upper 400 hp.