Thanks heaps for all the great feed back!!
it still has the original diff in in it at the moment i think the only reason it has stood up to the power so far is that i had a small clutch in front of it, now that i have a new heavy duty clutch and the ae86 sprinter box i don't think she will last much longer......
plus i have so many spares for the ke10-17 series rollas if anyone might need anything just let me know il have a look aand might part with some stuff, my parents have been busting my balls bout all the crap i have around the place...