The LSD unit in the Evo 3-9 rear diffs (Non-ACD only) are all the same.. And yes it will only fit into a NON-LSD DSM pumpkin with NON-LSD axles. The passenger side LSD axle has a longer inboard spline that goes into the differential and it doesn't fit. I believe the drivers side LSD axle will work though.

No damage was done to my diff cover.. just some sheared off axles which i'm hoping was due to the violent wheel hopping in the rear.

I also read somewhere that a Viscous LSD wears out over time as the fluid inside breaks down, and any VLSD with 100k+ on it is likely operating as an open diff! Even when the VLSD is working, it takes on the order of 2-3 seconds before achieving full lockup which is just unacceptable for AutoCross when you're roasting the inside rear tire coming out of a turn.. Now i'll be able to kick the arse out coming out of that turn - yeehaw!

More pics of the 12-plate upgrade and re-installation to follow..