the m3 evo swap will need to be a complete subframe and ideally the 6-speed box along with it . if you wanted to use the 5 speed box you would need a custom prop shaft iirc ,

in my opinion you would be better off asking valdas and see does he have a small case lsd or else swap in a medium case diff (3.15 ratio so would be a little slower)

if your feeling like spending a lot kaaz do a very nice lsd for small case but comes with a pretty expensive price tag,