In fact you should state also what width, 22 or 26". It is telling all the facts that you get results.
I do have a 68 26" 3 row rad, used in nice shape. B/B.
I just looked in the book and the "correct" radiator (assuming it's the smaller one) would be a "2898044". That's the number on the top tank. So iffin ya goes swap meetin and sees a radiator with THAT number on top (which by the way it will be a "round top") then it's the right one