1.0 is heaps better than a 1.3 if youtr running bigger rubber..>31".. you will need to change the flanges, and the handbrake MAY be an issue as the 1.0 and NT 1.3 are off the xfer not the rear wheels.. also off memory one of the mounting arms is slightly different.. there should be a write up around, Im pretty sure B4T wrote it up not so long ago..
might want to put what size rubber your running in the OT.. helps to determine whats better suited
Diff gears would be another option, but are somewhat harder and pricier than the xfer swap..