http://www.ppi-ats.com/LSD/LSD%20appli%20Nissan5.pdf
NRA109100
2Way
30 Spline? VLSD Shafts?
R200
Standard Clutch-Pack Diff
NRA10943 "r7a07-126" <Not Found, only NRA1094
4
2-Way
29 Spline Non-VLSD Shafts?
R200
Standard Clutch Pack Diff
Both are 2 Way Standard Clutch Pack diffs, If you could verify the spline count, and hub depths, I would likely buy the 2nd one, but I'm having trouble finding info.
LMK
Update:
http://www.ppi-ats.com/LSD/LSD_%20ap...10_Nissan4.pdf
10963 is the one for the KA