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Years ago I found the answer. Doing a 5.0 swap into a '90 4.0 Ranger I had both fans side by side. Diameter, mounting, depth, are all the same. except the fan to clutch pattern is different and the 4.0 has 1 less blade.
So as a whole, it will interchange.
But you can't put a 4.0 fan on a 5.0 clutch.