The circle of never ending mods
Re the sway bars, try this experiment. Take a wheel off, disconnect a link from one end, slide a large piece of pipe over the end of the bar, work the bar up and down while watching the mounts etc to see what happens when you load the bar up. Very educational.
My thoughts are that ~25mm is the maximum workable diameter for a front bar on a S30, ~18mm for a rear. Going from a 22mm to a 23 front bar improved my best lap time by almost one second, car rides well on the road too with 250lb springs all round and good Koni shocks. Trying a 24mm one next time, rear is 18mm, not touching that.