COMP Cams Timing Chain Chevy SBThis heat treated, pre stretched, double roller timing chain replaces the chain for our 3100KT, 3100KT 5, 3100KT 10 and 3135KT adjustable timing sets as well as our 3100 5 and 3100 10 Hi Tech timing sets. Catalog User 1 This Part Fits: Year Make Model Submodel 1977,1980 Buick Century Base 1977 1979 Buick Century Custom 1980 Buick Century Estate 1978 1980 Buick Century Limited 1978 1979 Buick Century Special 1978 Buick Century Sport 1978 Buick LeSabre