174/177 supercharged small block, where to start?

I think I am only limited to this fan here:

http://www.summitracing.com/parts/prm-19120/overview/

I THINK I can run 2 of those with that shroud I was talking about if I make it...

Those fans put out 2350 CFM each, at 7 AMP draw. Im not sure at all how it works when you use 2 of those...Does it double the CFM to 4700 and draws 14 AMPS?

I don't know...I just started researching electric fans today..trying to read all I can....