You can just send that 73 J4000 to me and I'll take care of it for you. No need to let it trouble you anymore.....
Yeah you can use it all if you swap the whole drivetrain over.
Either of the rear axles could be used as long as they don't have offset differentials. Your current Tcase has a centered rear output.
The front differentials are on the wrong side. Your current Tcase has a drivers side front output.
The engine to transmission bolt patterns are the same on the AMC V8s and inline six cylinders. As long as your Wrangler doesn't have a four cylinder in it, you could swap around those components.
The Tcases in either of those trucks will not bolt up in place of your current Tcase, so swapping over transmission and Tcases(along with front axle) would be the only way to use one of them.
A better SJ parts donor for your Jeep would be a 1980 or newer Wagoneer or J truck.
