The GAZ setup evolved over the years and now has 350lb all round which gives the car a very neutral feel. Plus when you wind the dampers down it great on the roads. The GAZ setup has lasted really well as the car has seen quite a few miles and still as good today as when I first purchased it. Makes me think twice about why I've gone for BC's really. Ah yes, now I remember, its price. The BC's cost me £500 less than the GAZ setup. As the car will only be for occasional track use I think I've gone the right way. The BC setup is more road orientated with spring rates of 225lb and 275lb. These may still be a little hard for the light 240z and probably just right for the heavier 260/280z. I'll have to see how it goes.