how about a j30 VLSD, from a forum ive seen before all you need to do is add 1 shim and it be workin as if it was a 1.5 lsd and 2 shim if u want it to act as a two way.
i didnt read about any cons of it. but yeah. try lookin that up.
here the right up about it. iono if this will help you. im thinkin of tryin this myself
http://zilvia.net/f/s-chassis/200226...-j30-vlsd.html