J30 LSD Question?

[pchio]

Hi, I just found a J30 in my local junk yard and I have a few question about it:

1) Does all j30 come with LSD?
2) What year of j30 should I look for?
3) Do I need the output shafts from J30?
4) I heard that there are 2 different gear ratio on the the j30 between 93-97, is it true? and which year I should get?

Thanks,
Patrick