I would call him and ask him. But even if so ... if it doesn't fit / work / whatever, you get ALL your money back. Of course, you still don't have a radiator.
I'd call. And call Champion Cooling, too.
~ Peggy M 1949 Chevrolet 3804 "Charlie" - The Stovebolt Flagship In the Gallery "We make a living by what we get; we make a life by what we give." -- Winston Churchill