I honestly don't know about the difference in the axle drops. I know a few guys who did it in their YJ's just nobody I know in a JK. Maybe have to swap a front axle too? I think it would be cool to ditch all the electronics in the JK and do it old school. If that doesnt work, you could always grab a 5.2 or a 5.9 from a 98-04 Dakota or Ram and use a Painless Wire harness setup.