2 - 1''Row Alum rads Any good
If you call Griffin radiators, Stewart components or Evans Coolant they'll give you the data. It isn't hard to find. This crap has been know for almost 100 years.
The marketing ploy of more tubes of smaller diameter is just that. Marketing nonsense.
Also, the two bigger tubes will cause more turbulance (so will speeding up the water pump to where it should be and using a high flow pump) than more, smaller tubes.
You can find this stuff if you go look.
