http://www.naxja.org/forum/showthread.php?t=1041059
There's the build thread that i'm doing for a 4DR. The frames match up to a point (somewhat), the floor of the MJ has extra support that has to be dealt with, the rockers don't line up right, and the roof line and drip rails are different. Before you get into cutting something and doing something this extreme look at some of the pics I've got and if you want any more detailed pics of how they are different let me know.