Off LA Ave, between First and Erringer. What color is your S14?
Well, even with an open differential, once you get the tires spinning fast enough, both will lock up. A lot of people have been able to drift on open differentials, though it's not exactly preferable. The biggest disadvantage (IMHO) in using an open differential is the violent snap you get out of a drift when one wheel suddenly starts gripping.
You may have had a VLSD for those three years. There's no reason someone who knew what they were doing couldn't have swapped one in before you got your hands on the car... still, as it stands, you have what's functioning like an open differential.
BTW, I can get you a J30 VLSD pretty cheap. E-mail me if you're interested.
[email protected]. Later.