Success from Ford's point of view is selling cars and making money.Unfortunately the Pantera as a new car was an image car for Lincoln Mercury.A hard car to sell and be profitable. As the saying goes the used car market has the tendancy to "fix" a new cars problems. As a used car, especailly from todays point of view it is very successful. There are not may cars that bring the kind of money in relation to its selling price.
Take a look at other image (performanmce) cars of recent history. The Impala SS (with the big motor) hard sell new but now bringing big used car money. The other is the Mauruader - another hard sell new but look at the resale value today.
The Pantera may not HAVE BEEN a success but it is a success today!