If I had a Flat Rad I would install a belt driven fan that pulls more air. Flex-A-Lite make a plastic fan. By trimming the blades It can be made the right diameter. By cutting a hole in the center it can be fitted to the Morgan water pump pulley. So now You have a fan that will pull lots of air. It will also sound like a B50 taking off. By trimming the blades the noise can be cut down. But it will pull less air. So it is a balance between pulling enough air and noise. Morgan Spares in New York sells such a fan, but it is already trimmed (too much IMO). But you can get the idea and some hardware by buying one of these. Then go to the Flex-A-Lite dealer and buy a uncut blade. If there is a will there is a way.
