Sorry for the late reply. Changing the axles and suspension from the Nissan GR to the Suzuki SJ-413 is going to be a custom job that will require help of a shop. It should be possible, as there was a SJ-413 that was changed to a coil suspension using parts from a Mitsubishi Montero, but it will take some work. If you decide to go through with the change let us know how it goes and post some pictures. It would be interesting to see the finished product.
