Ok after description, If it were mine i'd run a heater core without a fan. I woulld probably use a wabco electronic water control valve to control heat. The water valves are normally closed and a 12v signal to open and use standard 5/8" hose barbs. They advertise them as 2amp draw, but i would still use a relay to drive it off the temp switch.
Last edited by fsumotorhead; July 6th, 2012 at 02:52 PM.