One problem related to fuel delivery has been reported for the 1996 Ford Thunderbird. The most recently reported issues are listed below.
The plastic fuel line located on the passenger side in front of the right rear wheel rubs on the underbody of the car causing a large fuel leak. These plasic lines connect the metal lines from the underbody to the fuel tank. I have heard of other Thunderbirds having this problem from the yahoo Thunderbird club. I have pictures I can email to you if you are interested.