just wondering can a 2way diff off a turbo silvia fit a na silvia?

iv being told that all you need to do is change the prop shaft,i was also told you have to change the half shafts,and someone else told me you have to change both the half shafts and prop shaft and the sub frame,

does anyone know witch is true,or will i just mig spec the diff thats in it haha,

also if the turbo diff does fit,whos got the best recession priced two way