I raced an R32 GTSt in the Tasmanian Circuit Series last year called the Octagon Series.
The GTSt is a great track car as you can get the weight so slow much easier than a GTR.
I used Bilstien fully adjustable coilovers that Quadrant build from GTR shocks, these were set to they're recommendations that are on file if you call them. Its the standard GTSt track kit they can supply. The best thing to do is have the top arms in the front cut and shut to get atleast 5 degrees neg on the front, put a whiteline two stage anti-roll bar on the front and set it to the hardest, install a front strut brace and lock the diff up. I ran RE55s on R32 16" GTR rims so we could drop the ride height and they worked a treat.
The competition ready weight of the car was just on 1200kg. I ran a very mild mods, steel wheel turbo on 18psi, afm intercooler with waterspray, unichip and 3" t/b that produced 199kWs at the treads on a Dynologic.