the Buick 350 remaining as a factory option until 1980. In their place were a variety of GM V8s were offered, both as standard equipment and factory options. These included: 260 The was an Oldsmobile V8 engine shared with Buick: 1975–1977 Buick Skylark 301 The was a Pontiac V8 engine shared with Buick. 305 The was a Chevrolet V8 engine shared with Buick: 1978–1987 Buick Regal 1975–1979 Buick Skylark 307 The was an Oldsmobile V8 engine shared with Buick: 1980–1985 Buick Lesabre 1980–1984 Buick Electra 1980–1985 Buick Riviera 1980–1990 Buick Estate Wagon 1986–1987 Buick Regal 403 The was an Oldsmobile V8 engine shared with Buick: 1977 Buick Century estate 1977–1979 Buick Riviera 1977–1979 Buick Electra 1977–1979 Buick Estate Wagon 1977–1979 Buick LeSabre See also Buick V6 engine From the 1950s-1970s, each GM division had its own V8 engine family. Many were shared among other divisions, but each design is most-closely associated with its own division: Cadillac V8 engine Chevrolet Small-Block engine Chevrolet Big-Block engine Oldsmobile V8 engine Pontiac V8 engine Holden V8 engine GM later standardized on the later generations of the Chevrolet design: GM LT engine — Generation II small-block GM LS engine — Generation III/IV small-block List of GM engines References V8 Buick 350 V8 engines