My info came from the Dodge Ram Dakota Truck section here that use the Magnum 3.9L and 5.2L engines. This is one of the upgrade mods constantly posted in the section over there. Some people go to the local Tractor Supply store and just buy a sized pulley for the job. Cheaper in the long run.

I tend to visit the other Dodge forums that have vehicles using the Magnum series engine of my van generation. Our Van forum is good, but not loaded with really deep dive solutions. Also, I'm in the Caravan section too for the DW's ride. Got a 2005 with the electrical gremlins. Arrrhhhh. LOL