If you're going to go to the trouble of this setup you might as well dial in more caster than camber as it will affect the dynamic camber.
I'm all for this setup but another point to look at is the S13 is a heavier car and therefor the shocks and springs are tuned for that. I assume that aftermarket gear will be harsher again because the market never inteded it to be used on an >800Kg car.
It might just suit your requirements though so again I'm not saying don't do it.