Edelbrock Timing Chain And Gear Set GM V-6 EvenThe Edelbrock #1127 Ford Flatheads feature the original script logo design, the #1127 heads High Lift Large Chamber feature a new raised roof chamber that is for high lift cams and is perfect for reducing compression on low octane fuel. This Part Fits: Year Make Model Submodel 1977,1980 1981 Buick Century Base 1977 1979,1984 1988 Buick Century Custom 1980 1981,1984 Buick Century Estate 1985 1988 Buick Century Estate Wagon 1978 1981,1984 1988 Buick