I have a 65 with a 350 crate motor. I have installed a gm serpentine drive system and I am now considering the options a cooling fan. I have the original 4 core radiator. I would be able to mount a conventional clutch fan if I deleted the spacer shroud between the radiator support and the radiator, but I have also considered going the electric fan route. What are you guys running and how do they work? What would you suggest?