Tin-Man,
Your desires to understand the dynamics of these vehicles are well founded, but I think you may be stressing a bit too much over this issue.
Here's the bottom line:
If you charge into a corner faster than the vehicle is capable of taking the corner (let's call that 105%), you're going off. This applies to a mini-van, a Prius, a Peterbilt, or a Cobra. Some may go off forwards with understeer, some sideways in a drift, and some backwards with oversteer.
Now let's say you went into the corner at 98% (which you should never even approach outside of a racetrack), you can theoretically make the corner. The key is to give the vehicle what it needs to maximize its cornering ability. With the mini-van or the Prius, which inherently understeer, if you lift off the throttle it will improve the vehicle's front wheels ability to turn and you'll likely make it. With the Cobra, apply enough power to maintain your speed and steer. Exactly how much power YOUR car will want applied can only be known through practice in a controlled environment.
The bottom line:
A properly set up Cobra replica will have much higher cornering limits than most anything else you'll drive. You are unlikely to enter a corner at anything approaching 90% unless you are racing or just being stupid. Public roads might have water,
oil, or gravel at a blind apex, so driving at 90% is foolhardy.
It's my guess that you are about 500 times more likely to scare yourself with an ill-timed application of the throttle pedal than with an occurerence of lift-throttle oversteer. It's just good to be aware of the dynamics when a layer of dirt in a blind apex turns 70% into 90%.
"Slow in, fast out" unless you're Bob Bondurant (and he had plenty of practice).