The Thunderbird entered production for the 1955 model year as a sporty two-seat convertible. Unlike the Chevrolet Corvette, it was not marketed as a sports car. Ford positioned the Thunderbird as an upscale model and is credited in developing a new market segment, the personal luxury car.
When you have excess air in your stomach, it usually comes out as a burp. Usually the burp will have a smell of the food that you ate, but sometimes it will come out smelling like rotten eggs. This is a condition that is known as sulfur burp, and they can be very embarrassing and unpleasant, especially if they happen in the presence of others.
A rotten egg smell is usually caused by an animal in the ventilation system. Sometimes a small rodent or bird will crawl into the vent while sick, or become trapped inside. Once the animal dies, the decomposing carcass gives off the smell. Once you turn on your HVAC system, the smell fills the entire house. Ventilation and duct cleaning is the best method to solve this smell.