as title really, im interested whats interchangeable, we break jap cars and have lots of mx5 parts,

diff is the main thing. I have a NA fc3s and I believe they have open diff from factory, of course we cant have that!!

 

Hate to break it to you but this has been covered many times, however vague the answers may be. Keep up the research. Site:[website.com] ____ is probably the best way to search.