AutoCross Tire Width

[68Formula]

Keep this in mind, low profile tires help with cornering, but decrease straight line bite (stiffer sidewall).

So one way to lessen imbalance due to a big difference in front/rear width is to run a shorter sidewall in front than rear. While using a taller rim in the front would stupid, you could for example run a 245/40R18 in front and a 285/40R18 in the rear. On the first gen F bodys, this works aesthetically as well, since the rear wells are a little bigger.

Also, anti-rollbars are intented to balance the vehicles. A thicker rear bar will increases the tendency to oversteer and a thicker front bar increases understeer. Many first gen owners don't find it necessary to run a rear bar. So adding a large rear bar, would balance the effect of the staggered with tires. It will also help plant the car for staight line traction.

Finally, anytime you can remove weight from the front (or shift it from to the rear) will increase oversteer. If you can further take advantage of the reduced weight by lowering the front spring rate, this will help as well. Conversely a higher spring rate in the rear biases the car to ovesteer. And again, this should increase your straight line traction.

So while width is a big factor in the balance of the car, you can counteract it by adjusting weight, spring rates, anti-rollbars, and sidewall stiffness. It's also important to make sure you have the correct camber gain and static alignment settings, so that you're getting as much bite out of those front tires, as possible.

Food for thought.