A special ZR1 package added racing suspension, brakes, stabilizer bars, and other high performance components to LT-1 cars. Big-block selection was down to one engine but displacement increased. The LS5 was a motor generating SAE gross and accounted for a quarter of the cars. The LS7, which was equipped with a single 800 CFM Holley carburetor and advertised at at 5600 rpm SAE gross and at 3600 rpm of torque, was planned and appeared in Chevrolet literature but is not believed to have ever been delivered to retail customers, but offered as a crate engine. A short model year resulted in a disproportionately low production volume of 17,316, down nearly 60%. Rare options: ZR1 special engine package (25), shoulder belts in convertibles (475), LT-1 engine (1,287).