Originally Posted by signes
That would be fantastic if you can pull it off - not sure how the xDrive would deal with it though, not to mention all of the reprogramming, install complexity, ... I would give Nate or Ilia from IND a call. If there is somebody in Chi that can do it they will know.
Please keep us posted...
I would swap the entire computer system as well.
Actually, it would probably be easier to do the body work and build a custom wagon back end on the repaired M3. You'd need a good metal fabricator but this would certainly be easier than putting the entire M3 drivetrain into your wagon.