Electric cooling fan?
95-2000 Ford Contour fans. They fit a Champion 26" radiator like they were made for it...
I use a Dakota Digital controller to run the fans wired through a couple of relays. Goldduster318 has a whole write up of how to do it. I have more info and part #'s on my build thread.
http://www.forabodiesonly.com/mopar/showpost.php?p=1970313646&postcount=66
So far, they've worked awesome to keep my 340 cool. And it's .060" over, 9.8:1 compression, Lunati 60404 cam (.513/.533, 276/285 adv. duration), headers, ported 308 heads, etc. So, it's not exactly a mild 340.