Sounds like its time to give strange enginnering or Moser a call. That being said i would run the stock stuff till you break. That is if you can get your car home after it breaks.
strange axles will likely go in. I need to do it before I break. Track is so far away (130 mile round trip) that the tow bill would nearly cost what a new diff would cost.
The diff is what i cant decide on... auburn pro, strange, eaton... etc.
Iwould run an eaton unit and 31 spline superior axles reason being the axles are warrented for 3 years and the eaton is awsome because u can take corners ant it unlocks so its not skipping like a full spool i have the same set up in my car and i love it. and i also drive over 100 miles to the track
I had trouble with Moser in my 85. The bearings did not fit right, the welds looked rough. To their credit, they did send me parts to fix the problems. For what its worth.