I used an electric fan/shroud combo from a Chevy HHR, grabbed one from a junkyard for dirt cheap. Fits the V8 sized radiator really well and no issues keeping it cool in traffic in the summer.
I have an aftermarket aluminum radiator so I was able to mount the shroud directly to the radiator. This website shows how to mount it using the stock radiator.
http://www.66c10.com/electric-fan/