this has been covered in the tech articles, the disc conversion at least. it involves an rt141 corona rear disc assembly, but some cutting and welding is required to relocate shock mounts on rear axle.
someone whould be able to tell u the track widths, but im sure its been metioned many times before. I dont think it is a direct bolt in axle swap, but if u are handly with a welder/grinder im sure u could.