If you decide to swap in the planetaries from the van, be advised that Mopar changed the shape of the drive splines, somewhere in the late seventies I think. The spline count is the same but the shape is different. It is possible to swap them , but in a few miles the old shaft will nicely machine out the splines in the replacement planetaries, and forward locomotion will completely stop. If this happens at WOT, your revs could go thru the roof. I don't recall what year this changeover occurred, so it's probably in your best interest just to not do it,lol.
