I need a good engine coolant transfer pump. It will pull double duty to supply heater in winter months and supply remote mounted cooler for summer needs. I have used fuel pumps with fair results and think there must be better product out there. The NASCAR guys use a pump but cost about 300 bucks and that just seems wrong. I need some ideas here guys.... help. 12VDC pump for 250 degree max petrol. based liquids ????