Hi Clive ,
With Spring round the corner and watching your progress I am feeling I should be getting involved in my motor again .
Did your CV's come with clips ? One needs to be carefully selecting clips as slightly the wrong ones can leave your CV's stuck fast in your diff/LSD . ( not easy to overcome believe me ! )
My prop is 517mm T9-Subaru .
A reminder to people going Subaru , parts from Subaru are stupidly expensive , single retaining clip Â£7 , diff bearing Â£56 , so don't think maintenance will be straightforward without trawling breakers .
Out of interest the Subaru link above is the only link I have ever found that has even talked at all about the ' type 1 and type 2 ' viscous units . I have never found any information explaining details/reasonings about these two versions . It seems Subaru themselves must be very closed on info or may be one needs to speak Japanese .
Best bet is to have your Subi diff fitted with an aftermarket LSD whether Quaife , Cusco , Kaaz , Tomei , Carbonetics, M factory , Subsru or others .
Also it is regularly suggested that viscous units have a limited life so don't think that because you have found a viscous unit in a breakers that you are sorted , the fluid could be knackered and it is now acting as an open unit ( not that efficient when new ) .
Also it is also wise to take an imprint of the internal splines and ring clip grove position and compare that with your CV splines and ring clip groove position , some combinations look good and work but actually you will have very little mating spline .
Don't forget that a great deal of info on Subaru forums is flawed so triple check .
However I do have a brand new Type 1 viscous LSD unit ( 4 spider gears ) and a pair of CV's to fit I need to sell on .