Hey,
I was wondering if any of the 240SX models came stock with an LSD?
91-93 Hicas cars do. 
My hatch does. It’s an SE with no HICAS but she still does the two wheel peel.
B-Wurm 
my '96 le did as well
jack your car in the air, and spin one tire, if both tires spin…walla u have a lsd…also look for a orange sticker that says VISCOUS, but if it was canadian car, chances are the sticker fell off, due to road salt…
Find an empty road, put it in first, rev to 4000, pop the clutch and count the tire marks behind you!!
I burnout with 2 wheels but im still skeptical I have an LSD ( 92 SE HATCH non-HICAS)
most 91 plus 240’s from canada have one.
If you lay 2 stripes you are good to go, expecialy donuts with 2