Hi there it's me again , today I whent to the shop where the car is at and , notice that the axles dont go in all the way ,mines look just like yours in the picture you posted , than i did this ,took the left axle and installed it in the right side , I know that the spline side is shorter than the right side but it was just to test it , than I compress the suspension using a trans jack and notice that i had just about 3/8" of side to side movement and the spline side ofcorse does not sit all the way in to the end of diff (the quafe has a stop at the middle of the diff wich will not let you go in too far) but just whanted ti see it , knowing this I removed the left axle and try it in the left side and I notice that with the suspenssion hanging the axle feels like is binding and it does not move in or out , but ones I compressed the susp i had again about 1/4" of clearance , so I installed the lock ring in the diff and the left axle with the cage fliped in the left side and now I am going to find me another left axle and replace the spline side with the right side one and I know is going to work fine , now if any body has a spare left axle I will buy it from you.
HERE IS MY COMBINATION :
1971 240Z
EIBACK LOWER SPRINGS ,TOKIKO ADJUSTABLES INSERTS ,1986 300ZX TURBO R200 DIFF , QUAFE LSD, AXLES FRON SAME VEHICLE 86 300ZX T,MMS STUB AXLES AND FLANGES , ADJUSTABLE CONTRL ARMS.
I HOPE THIS HELPS TO SOME ONE THE SAME WAY IT HELPED ME.