Plymouth's Prowler is the first factory-built hot rod in history, a vehicle that simply has no direct competition because it is unique. It's built in the same Conner Avenue factory in Detroit as the Dodge Viper, and will only be available to about 3000 customers in 1997, so there probably won't be another one in your neighborhood--unless you live in Beverly Hills or Miami Beach. While the Prowler is significant to Chrysler Corporation's design reputation for its attention-getting index--which is off the charts--it is also important to Chrysler's technical reputation for its extensive use of aluminum. The final car is about one-third aluminum by weight. Cast, forged and extruded aluminum parts are everywhere, and they serve to not only lighten and strengthen, but also add some techno-glamor to its underpinnings. Even the rear brake rotors are aluminum.