From what I remember from the JC site, the 3rd members are totally interchangeable in the year ranges we are talking about. The axle splines should fit as well. Seems to be one of the few totally bolt-in mods available from the junk-yard. And if your tires are big enough, you don't even have to jack up the truck to do the job!

Current fleet (subject to change w/o notice)
\'49 GMC 3/4-Ton , 60 Austin Healey Frog-eye Sprite (some assembly required), 2011 Dodge Avenger, 2015 Jeep Cherokee. No, they don't all run.
My other ride is a (B737)no, (B767)no, A320.... Update... was Embraer E190, now Boeing B787.

Knowledge is a wonderful thing, but ignorance means you don't know you can't do something.