1969 1/2-1981 Pontiac Buick and Olds Timing chain coverAluminum timing chain cover 1969 1 2 to 1981. Make Model Year Block CID Liters BUICK CENTURY 80 79 V8 301 4. 9L BUICK CENTURY 81 80 V8 265 4. 3L BUICK ELECTRA 1980 V8 301 4. 9L BUICK ESTATE WAGON 1980 V8 301 4. 9L BUICK LESABRE 1975 V8 403 6. 6L BUICK LESABRE 80 77 V8 301 4. 9L BUICK REGAL 80 79 V8 301 4. 9L BUICK REGAL 81 80 V8 265 4. 3L BUICK SKYLARK 1977 V8 301 4. 9L OLDSMOBILE 98 1975 V8 403 6. 6L OLDSMOBILE CUSTOM CRUISER 1975 V8 400 6. 6L