dual electric fan mounting question ?

I wouldn't consider fans with less then 2000cfm between the pair for a mild build, hence why I initially asked about the fans capabilities because this would be all for naught if you have a pair of crappy fans. 3000cfm and a four core 26" rad for serious hp, this will move some air ( no heating issues on the hottest days). Fans that move 1000-1500cfm aren't cheap for 10-12" sizes but many come with their own shroud ($150-200each for quality brands). But, to not have the dreaded overheating headache they are worth it IMHO.
I'm running a pair of 1500cfm fans, I've had a wire come loose and only one was kicking in, it started to overheat. You can never go to big with fans.