The 1980 Bel Air along with other full-size Chevrolets, was revised with all-new exterior sheet metal, which helped improve aerodynamics and thus fuel economy; the car was also fitted with a new grille, identical to that of the higher-priced Impala; the rear-end triple-taillight setup also continued to be shared with the Impala. Also that year, the engine lineup was revised with the inline six replaced by a new 3.8-liter or 229 cubic-inch V6 based on the small-block V8 as the base engine in sedans. The new base V8 (standard on wagons, optional on sedans) was a smaller 267 cubic-inch small-block with two-barrel carburetor, while the 305 small-block (optional on all models) got a increase to thanks to the change from a two-barrel to four-barrel carburetor. The 350 V8 was now restricted to police-option vehicles. Another new option for 1980-81 was the Oldsmobile-built 350 Diesel.