I did find some data on the crank used in the Powerstroke and the journals are a couple of mm thicker than the LR engine (approx 69mm vs 65mm) but I cannot find it at the moment. It also inferred that because of this the block is slightly different as well, but I suspect all internal stuff.
Assuming that all the sensors etc and basically the same and can be swapped around then maybe there is no issue in swapping a complete long engine across - after all someone has replaced a 3.0 with a 2.7 and did not have major issues.
Garry

