I used a mid 90's Thunderbird fan, trimmed 1/2-3/4 inch off the fan surround so it cleared the waterpump pulley to sit closer to the radiator. I had a Flex-A-Lite fan controller which runs 60% on low speed, and 100% on high speed. Mine kicked on to high two times during the summer of 2012(one of the hottest humid summers in a long time). I was sitting in traffic with the ac on and it ran on high for about 2 minutes and that was it. Only 2 times I ever heard it on high. Those fans move insane amounts of air, and with the FAL controller hooked to the factory high side pressure sensor it came on with the ac(didn't cycle with the compressor because electric motors aren't made to do that). I wired it up, set the temp, and never messed with it again.