an lsd from an rx 7 from 83.5 will fit into an 85 rear

i think i got this right done alot of searching trust me
my eyes are bleeding from looking at this screen

for the record its just the lsd nothing else

 

there's a difference in large and small axles but i'm not sure what yrs had what.

 

Large bearing axles were from 83.5 or something to 85. These diffs will swap. Earlier had small bearing axles and different splines. There is some argument about when they switched over, but so long as its large bearing to large bearing it will work. The large bearing diffs also had bolts and nuts for the diff flange instead of threaded holes.