This is for cars and trucks with 12 volt systems.With My 50 Chevy pickup I used a late model GM electric fan that mounts on the outside of the radiator.I used a toggle switch with mine.Most better auto parts will have a temp.switch to turn it on automaticly. Rarely ever had to turn it on.Only needed it when I would sit in traffic for more than a few minutes.If You need the Hollander part numbers let Me know.
EvilDr235
------------------
Two types of people drive old cars.Rich people because they want to and poor people because they have to.
Remember EvilDr235 has a cure for Your sixness.