FSM actually stands for Factory Service Manual, meaning the repair manual published by Chrysler. They're about an inch thick and the Imperial manual also usually covers all Chrysler models of the same year. Around 1970 or so, they began to separate the manuals into two sections, labeled Body and Chassis. The body covers just about that, everything else (engine, electrical, drivetrain, brakes, steering, suspension, etc.) is in the Chassis manual. Chris in LA 67 Crown 78 NYB Salon