Actually you dont NEED any of that. infact for a dialy driven car that would be just stupid to invest in.
if you REALLY wish you car to be ideal for track and autocross use the raise it up 2 inches and sacrafice the “looks”.
even if you were to get the lowercontrolarmsbushingstirerodsnrca’s blah blah you will still be putting an awkward load on a suspension setup that wasnt supposed to be like that from the factory.
The 240sx race cars that run that low have been totally re-engineered to allow the car to sit that low. MOstly by way of rebuilding subframes with inner control arm mounts that have been moved to allow full suspenion movment with no binding.
Also lowering your car to that level will not allow the shocks to use their full stroke as they were intended. You need to allow the car to rebound and compress in order to actually gain traction, hence why you see many cars bouncing around corners due to the fact that the shock/spring is at its maximum limits and really is doing nothing but keeping your frame off the ground.
By no means am i some sort of engineer or guru of suspension holyness, however im an enthusiast of it because my car is slow 
so i have make up in the corners. (i read teh books and test the theories)
raise your car, get an alignment and go have fun. itll cost you a 100 bucks and you love it.
Greg