I think a racing battery, radio delete and a couple other things will get me to 2250. But I think that's about all I'll get and still be FSP legal. A friend of mine had an AE86 hatch built for FSP right at 2200. A coupe would be lighter. So I think all in all, 50 to 100 lbs. more for a Celica than an 86. That's assuming a SRA.
What I'm not sure about is ST vs GT. Everything I could find looked like it was about 50 lbs. difference, coupe to coupe. Power mirrors, folding seats and stuff, but that seems like a lot to me. Cruise control, I guess. Dunno if that can all add up to 50 lbs or not. An early ST with a carb might be a little lighter than EFI. Actually, I bet it is. Manual steering would be a few lbs. too. I'm not giving up either, though.