All Jeep Frames the Same?

[stainlesself]

I found a 2013 Jeep JKU frame in my area for $700 anybody know if it would fit on a 2011 JKU body? Or if there were major frame differences between the production span of the JK?

 

[wayoflife]

So far as I know, it should be exactly the same except for may the motor mounts. 2011 still had a 3.8L and 2013 a 3.6L