ok i have a 76 ford highboy with a gutless 360 stock motor in it, i will be dropping a 390 into it soon. i have an after market aluminum radiator in it right now... im wanting to pull the fixed fan off the water pump and go electric. im not worried about how many inches acrossed the fan needs to be right now cause i can deal with that later. im more worried about the cfm's. its just to keep my truck cooler in stop and go traffic and while idling. i will how ever put a remote bypass switch in the cab to control it just as they do in semi tractors.. any advise or input would be highly helpful i was told by one person that i need a 3300cfm fan...