I wonder if the fan shroud would be the same shroud as the factory fan shroud in my 1976 Dodge D100 ? Came out of a '76 D100 parts truck with air conditioning, on the factory 26" x 18" radiator.
Dodge shroud number: 3828289
I use the same 26" radiator and shroud on my engine run stand too.
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Just picked up a brand new replacement radiator from Rockauto, 26" aluminum core with plastic tanks (165 + ship). Surprising it is an exact copy as far as all the mounting brackets are concerned, i was thinking I was going to have to redrill for the mounting to the core support . . but not.
My factory truck shroud bolts right up to it.
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Like your copper replacement radiator very much too.