Yokohamas like more camber, but it is hard to get more unless you lower the car. If you are serious about doing it, I would recommend the camber gauge. But I used a standard level for years before I bought my camber gauge. 1 degree stock specs. Next is camber, and last is castor.
More castor give better high speed stability at the expense of steering response.
Differences side to side in castor, and too a lesser extent, camber, is usually what makes a car pull. Toe can do this also. Rear toe out is dangerous. The stock Vette does not have enough front camber to make it understeer, so it is safer for the average driver. My specs should get a street vette closer to neutral without giving up high speed stablility and without hurting tire wear too much.