Hey! Someone agrees with me on this one. I been saying this for years and years.
I checked all the fans I had around, BMW M30 ones. 603. 606...all have wrong pitch blades. Even considered a V8 radiator in the 300SEL and figuring out some sort of radiator hoses to work. Closest I found I recall was an SDL radiator and one of the hoses matched close, but one was crazy out.