If you have the room and looking for ideas on how to wire it, I have a write up on here for the dual thermofan setup on my XJ. Runs in series for half speed with ignition then runs in parallel full speed with the factory settings. Can wire manual switches for both off and both full speed as required.
http://www.ausjeepoffroad.com/forum/...d.php?t=114445
That said, when fans are pushing air through a radiator they are less effective than pulling air. Maybe do a search for a write up on a Ford Taurus fan swap? These are popular thermofans as they seem to be one of the most powerful available and so are popular with many high performance car scenes.