‘91 Dakota’s with the 5.2 got a serpentine belt drive. I’ve got one and have had to replace the tensioner twice now and they don’t make make a new one since it was a one year only deal. Different than the ‘92 and up Magnum setup. Real pain in the butt. So I know for a fact that they had a different setup than what you are showing.
D100’s, Dakota’s with the V6, vans, etc all got what you are showing. Dakota’s did not.