so my rear dif has oil all over it and was woundering what should i do

rebuilt it and put the new seals in or get a diferent one

where can i get and how much is the lsd that will bolt right up to stock 92 sc3 w manual trans?

 

Those are easy to fix. Is the leak at the side or rear?
You can get a lsd unit from sc/gs/mk4(not 6sp) maby 2-way . There is a write up around here....

 

the leak seems to come from sides and rear

is there a link, whats the benefit of lsd?