Unfortunately the Carfax doesn't help. After 60k miles, the mileage wasn't recorded from '93 till '03 when it is listed at 73k miles. It's probably 173k, but who's to know? Examine the car closely and look for evidence of high miles. Check wear on the pedals and steering wheel...look at the front end components too. If the car feels reasonably tight and the tie rod ends and such don't have a new look to them, they might be original and mean lower miles. 70k miles is nothing for the venerable 3.8 and while the motor might have the horsepower of a tricycle, it results in less wear on the rest of the car.
Why do you want a clone? Unless you're dirt poor, you can get a nice hot air T for a decent price.