Does a single electric fan outflow a dual fan? My single fan sometimes makes a noise when it's on (sounds like a bad bearing or something). I have a toggle switch for my fan on the dash and use it alot. Anyway, I will eventually be dropping in a HO 350 and want all the colling I can get. Is a dual fan an easy swap for a single fan? I will stay with the single fan setup if it outflows the dual fan. Does it sound like I should replace the fan motor I have or go with a dual fan setup.

Thanks in advance.