Horrspower

improve exhaust and air intake would be the simplest and lowest cost places to start. If you want jackrabbit starts at the street light switch differential gears to something shorter than stock, 3.55 minimum up to 4.11, but you'll lose top end speed and gas mileage. There are a bunch of ways to do what you want, find a forum for the Caprice, there are a lot of people who buy/mod these as they were used for years as police vehicles.