S model=
NO sun roof,NO pwr mirrors,NO LSD 12A engine
GS=Has sun roof and pwr mirrors,no lsd 12A engine
GSL=has sun roof,pwr mirrors,LSD with disc brakes but 4x110 pattern,rear wiper,pwr windows, 12A engine
Optional,leather seats (top of the line for GSL) *I think optinal pwr steering
GSL SE 13B 6 port FI, LSD with 4x114.3 lug patterned geared at 4.07 (all others at 3.90) leather seats,pwr mirrors,rear wiper,front mount oil cooler, blah bla you get the idea...
You have a GSL from what I hear and read..
If you need some first gen parts,letmeknow,I still have some goodies tucked away,I got a clutch set also,with about 1000 miles on it*if that,I got someone with an extra header..