All 4x4 cosies had 7" lsd diffs with m8 bolts on 100mm flange and all 2wd cosies had 7.5" lsd diffs m10 bolts on 108mm flanges!
you can tell if its a 7" or 7.5 inch diff by measuring where the long bottom bolt goes through to mount it 7" bolt should be 208mm long and obviously 7.5" bolt is slightly longer