Okay, the radiator is from a Honda "Life" 600cc car, which is sometimes called a "City". The radiator is in the book as an "HR920". That's all the information that they had on it as it's apparantly a very old radiator.
Now that I have it, it actually has 13FPI. The core area itself is 1⅛" thick (~29mm). Exactly 300mm wide in the core area, and exactly 240mm high.
Here's a piccy of it. The tanks on it are customised cut-down tanks from a different car radiator. It's set up in a single-pass configuration and let me say that it has exceptionally low flow resistance.
