Misc Parts and info needed

Hi, Im new to the site.
I drive a 2004 Ford Crown Victoria
just hit a 120,000 miles and ive never once had a problem with it.

Times are getting hard and im having trouble with the gas mileage that my Vic gets.
I read that if you swap out the computer in the Civilian issue CV for the computer in the Police Interceptor CV...it can provide better fuel economy, as well as more horsepower and torque....is this true?

Also, does anyone know if it is possible to buy the Special Edition Grille. I dont think its offered in the US....

On yet another note, I would like to swap out my Instrument Cluster(speedometer and whatnot) for the digital display...does anyone know where i can buy the digital display?

Any and all info you can give me is helpful

thanks

The only big differences in the computer settings between Civilian and Police are as follows:

Higher idle, due to the fact the cops spend so much time sitting still "doing paperwork"

Quicker shift patterns, to get up and go when they have to.

Higher top-end on the engine, for those high speed chases

All joking aside, there really isn't that much of a difference in the computer settings. All the CVs are about the same. The Police have a modified suspension (expensive parts) and slightly heavier duty transmission (extra parts), but that's it.

Do your research well before going into any project. Sometimes you need to locate specific parts to use.