What diff do I have/ or should I use in my 180sx?

[curtains]

Ok so here's the low down,

I bought a 180sx type X a while ago but the body has been crashed, I mainly bought it for most of the parts, and then I bought a rolling body to transfer the parts off the type X onto.

Now I know the type X has a LSD (I think R200?) 3x2, and the new rolling body has a Diff (not sure if its LSD or not) but its also 3x2, now when I turn the center of that diff both wheels turn, and when I get someone to hold one side still its really hard to turn, does that mean I have a locky or a LSD and how do I tell what model diff it is?

I also have a R33 R200LSD 5x1 with axles (and drive shaft)

Which diff should I use? I hard R33 diffs need the back plate changed?

[curbhuggerrps13]

if they both turn the same way by spinning one side, if it has a orange or yellow sticker that says vlsd, but if you crack it open and it looks like this it is open diff
http://i10.photobucket.com/albums/a126/dxboost/IMG_20110717_200102.jpg

[Vernal]

if you rotate it more you should see some clutch discs

[alexanderig]

what do you want to do with the car?

[curtains]

@alexanderig

fast street car, few track days, some drifting