Why not build a semi-race car or Pro-Street Saleen with either the 351 or Cobra DOHC SC engine?
As Marcus said, it's all a matter of what you want to do with it. IMHO a theft recovery car, even a restored one, wouldn't be worth as much as a non-molested example only because of the stigma associated with a stolen car. Most people would be leery of such a vehicle because of the checkered history.
Back in early 1989 when I was shopping around for a new Saleen, a local dealer here in San Diego (who shall remain nameless) had a '89 Saleen that was a theft recovery from their own lot. It had only been missing a week or two & sustained some minor body damage which the dealership repaired. I took it for a lengthy test drive & there didn't seem to be anything wrong with it.
Despite the great deal the salesman was willing to give me on the car, I had to pass simply due to the fact that it had once been in the hands of criminals.