You can try to get extended assistance.
Other than that, its not a HUGE deal. Drain the x-case, remove the exhaust, rear head pipe, exup valve (and anything else small in front of the right side chain cover). Open the cover, remove the primary nut and take the pinion gear out along with the spur gear (attached to the ganked up shaft) out. You will need a new shaft and primary belt pulley. The interior of the x-case should be clean of shavings but I would want to replace the shaft bearings which may require a confident technicians touch; but its not an impossible driveway job.
You are looking to replace #13 and the belt pulley not pictured along with all gaskets, exhaust rings and gear fluid.