I disagree about electric fans being no good. Most modern cars use them exclusivley. There are many aftermarket fans, and quite a few good OEM fans you can get at the wrecking yard. I thnk Ford Taurus fans are quite popular. Most of the wrecking yard fans will come with a plastic shroud that can be adapted to many applications. Take your measurments and head out to the yard with your tape measure and see what you can find.

Personally I have 2 electric fans on my Studebaker. 1 16" puller for primary cooling and a 14" pusher that comes on with the AC. My LS1 runs pretty cool anyway, but this set up has worked great for me.

Pat