I agree, fans on all the time is not great idea. I'm running a mishimoto rad (Josh is a dealer) in the Z, with 4th gen fans, a DCC fan controller and a stewart water pump. Never gets hot, not ridiculous in price. Depending on EFI setup you go with you can probably use that for fan control as well.
Most third gen tanks are unbaffled right? Given the usage you might want to look into more modern setup. Depending on the EFI route you go would a 4th gen plastic tank and fuel module be a reasonable step up?
Dave, this would be way easier over some beers