Complex sentence: They were assembled in Wayne, Michigan and Mahwah, New Jersey, and also overlapped with the Maverick/Comet's ultimate successors, the Ford Fairmont and the Mercury Zephyr, which were released in 1978.
Split into simpler sentences: They were assembled in Wayne, Michigan and Mahwah, New Jersey. They also overlapped with the Maverick/Comet's ultimate successors, the Ford Fairmont and the Mercury Zephyr, which were released in 1978.