Regardless of history, provided that there were no internal modifications to the car, and nothing major externally, you should have a very long life out of the car. These cars were built with road racing and auto-x in mind, in everything from the donut oil cooler to the suspension setup, the ITR was truly a race inspired car, and in that spirit, it was made to handle an incredible amount of "wear and tear" I guess you could call it...The only times I've ever seen them break, is from misuse or modification. Otherwise, I'd say you're ok...

Goodl uck,
Aj