B&M 70500 Differential Cover Weight: 9.72 Fitment: 1983/Chevrolet/Impala/Base Sedan 4-Door/5.7L 350Cu. In. V8 GAS OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Impala/Base Sedan 4-Door/5.7L 350Cu. In. V8 DIESEL OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Impala/Base Sedan 4-Door/5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Impala/Base Sedan 4-Door/3.8L 3800CC 231Cu. In. V6 GAS OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Impala/Base Sedan 4-Door/3.8L 229Cu. In. V6 GAS OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Caprice/Classic Wagon 4-Door/5.7L 350Cu. In. V8 DIESEL OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Caprice/Classic Wagon 4-Door/5.0L 305Cu. In. V8 GAS OHV Naturally Aspirated::8.875 in. (12 Bolt), Rear^^1983/Chevrolet/Caprice/Cla...