Those big police cruisers were built at the Newark, Delaware Assembly Plant. My father was the Quality Control manager there. On the weekends, I would go with him to the plant. Behind the plant was a 3/4 mile test track. I learned to drive those big interceptor sedans when I was a young teen. He would bring home a new car off the assembly line every night. He would get pulled over wen he drove a police car home (especially when it was painted up for a neighboring state).