Coopersburg & Liberty Kenworth History In the 1980s, Donald Metzger opened the original Liberty Kenworth location outside of Philadelphia. Within 10 years, it became necessary to open a second location and Coopersburg Kenworth was born. Located on 25 acres just south of Coopersburg, Pennsylvania, we’re easily accessible from I-78 and the Pennsylvania Turnpike (Interstate 476). Coopersburg Kenworth offers new and used truck and trailer sales, parts, a full service department and a body shop. In 2008, the original Liberty Kenworth dealership was moved to a brand new location in Swedesboro, New Jersey. The new dealership, Liberty Kenworth of South Jersey, offers new and used truck and trailer sales, a fully stocked parts department and a state-of-the-art service department with a quick lube bay. This 15-acre facility sits on Route 322, within 5 miles of I-295, the New Jersey Turnpike, and I-95.