The 1981-1982 Mercury Cougar Radios are designed to fit the original dash in your car. In order to do this we need to build a custom radio with correct dimensions. There are three different models to choose from. We have the USA-230, USA-630, and the USA-740. All three of these models are AM/FM stereos that come with different functionalities. Don't make any modifications to the dash in your car and buy one of our radios for your 1981-1982 Mercury Cougar today!