I run a Kaaz 2 way in my track 350Z and it is superb.
I also have a spare Kaaz 2 way that has not done a lot of miles which will be for sale shortly.
I can set it up at 50% - 60% - 80% or 100% lock for you.
I run mine at 60%
It can come with or without side bearings.
If you want it all set up and installed into a pumpkin, then I can also do that for you so that all you have to do is install the complete diff unit to the car.
Just drop me a PM if of interest to you.