Lets say you overhauled your mustang and I mean it's completely brand new from your restoration and modifications then this post is also for you.
A couple years back I got fed up with the Speedometer I had, so I went on a hunt for economical upgrade certified by Ford. 1982 was the first year for the Police Interceptor Mustang and I found what I was looking for in a salvage yard out in San Jose, California. 1982 was also the first year for the Ford 302 HO(High Output) V8 motor. The Ford Mustang's first Police Package included 140 mph speedometer. This car was marketed to be the car to chase the exotic imports that were out running the police in California.