Fan shroud part numbers

This may sound crazy, but last weekend, my son Aaron and I were dealing with the same issue on his '74 Duster. We installed a radiator that was taken off his grandparents' Dodge Maxivan. It bolted up perfectly in the Duster. We had already swapped in the 360 from the van in place of the Duster's original slant six, but the van's shroud was way too deep to fit.

We had the slant six shroud handy, so we had to give it a try. The mounting bolts lined up perfectly on the radiator, but as you said, the fan opening was offset too far towards the passenger side. Then Aaron had a brainstorm...
flip it over. It fits like a glove. The only thing we had to do was trim off the raised part that says, "CAUTION: FAN", and a little notch was necessary to clear the lower radiator hose.

Who would have thought????

Jerry