transfer

I recently bought my first CJ mostly as a deer lease vehicle. I’ve wanted one since I was a kid listening to stories my dad would tell about his (‘74 CJ5 with the 304 V8). I knew it would need work eventually; It is much older than I am after all, but I wasn’t expecting it would be so soon...

From what I've read on the net it looks like a striaghtforward swap. Has anyone done it? What could go wrong at each end? -Input shaft could have different splines... I don't know how the transfer case hooks to the trans so I am only assuming that it's the same for both transmissions...