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I mean a viscous drive fan. The deuce fan is a direct connect. A fan with viscous coupling spins only when the engine gets hot (in theory).
http://auto.howstuffworks.com/cooling-system9.htm
Cheers
Bob
As far as a fan clutch goes, it would be very easy to put one between the fan and the pulley that drives it. The only consideration would be OAL of the fan assembly... perhaps there's a shorter fan available, however, with a viscous drive that would help control the cooling a bit better.
Bob
I'd just wire up two 12v fans in series. The fans, believe it or not, on Ford Taurus's (and related blue oval products) are very good cooling fans and come with their own shrouds. You want to look for the 3 wire fans. Google this and you'll find that they are very desirable to motorheads...