Help determing what axles I have **PICS**

You can get tone ring adapters for your 31 spline axles. When I had my last car swapped all over, the place I ordered my axles from said that they had adapters, so I bought them as well. The shop I had install everything said that the rings might get messed up on removal from the stock axles, but they came off alright and worked great. The only problem for you would be finding some rings, or some stock axles with rings on to remove.

Once the differential itself is swapped out for 31 spline, you have to run 31 spline axles. If you wanted to step back down, you wouldn't be able to just swap the spider gears, you'd have to get a completely different differential. If I were you, I'd just get some of the tone ring adapters and try to find some stock axles with rings at a bone yard or Ebay.