Hi Rampage,
There's no fundamental reason why G-bodies can't pull "major G's." The COM height in relation to the track width is reasonable, and especially by today's standards.
Basically, make the suspension rigid, and use the widest/stickiest tires possible, and you can go well over 1g maximum centripetal acceleration.
Now, things go south in a hurry when you actually want the suspension to move! This is especially true for the rear, which does strange things as it works over bumps.
For the front, the poor factory camber gain makes things bad.
If it's any consolation, with moderate to somewhat major surgery, both drawbacks can be corrected.
Best,
MAP