Andrew It all depends on when the car was pushing.I would first try changing springs to adjust weight transfer. If the car is pushing going into corner you need more weight transfer to the front so therefore a softer spring in the front. If the car is pushing out of corner it means there is too much weight transfer to the back tyres so try stiffening the rear springs. By changing springs like this you will notice significant changes. Once you find a spring set up which is close you can then fine tune it with roll bars camber caster etc. I find that at bayside you don't need roll bars unless you are running a very soft spring,there just isn't enough grip on the concrete to need roll bars. Another thing to consider is droop and ride height which you can use to controlsteering push. I had the same problem that you had but after much trial and error i now have a setup which is pretty good. The order i would try would be Springs Droop then ride height.
Just my two cents worth
barry