I use Spal fans. Amazon.com Efficient and move a lot of air. You have to watch the amperage draw. Cheaper fans will pull more amps. A 10-12 inch pusher fan in front of the rad will most likely work for you.
Cheers,
I have used Pusher fans (SPAL) and Puller fans. If you can get enough room I feel a Puller Fan is superior. Getting the room is the trick. Several NorthWest Morgan Owners have found the space by extending the lower mount a bit. I was able to on My DHC. Installed a Universal Flex-I-Lite fan with shroud. So far it works OK. But has not been tested in 100+F. heat climbing a long hill at 70MPH.
