First thing, getting them under the JK. Spring perches, shock mounts, and control arm brackets would need to be relocated.
Getting custom drivelines to mate the axles to the transfer case.
Finding a way to adapt the speed sensors in the hubs to the Dana 60 hubs. Or find a way to adapt your JK hubs to the Dana 60 knuckles. (Custom axle shafts).
Then there is the issue of wheel change if you stick with the Dana 60 hubs.
If you can do all of this on your own, then you come out ahead. Factor in labor to do all this, then you may be close to a new one.