Sounds like an awesome car, the coolest part is that almost all that stuff came stock on it. My 1200 came with a rear sway bar bolted on the back. It attaches to the rear end with big
exhaust clamps through polyurethane bushings, then connects to the frame rails through adjustable end links. The front sway bar is not stock either, it is huge compared to stock.
There are stickers on both the front and rear sway bars, but they are unreadable (faded). I think these are the Addco ones sold by Nissan Motorsports (NISMO), yours might be too.

-Andy