Edelbrock Timing Chain And Gear Set GM V-6 OddThe Edelbrock #1127 Ford Flatheads feature the original Block 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 1975 1977 Buick Century Base 1975 1977 Buick Century Custom 1975 1977 Buick Century Special 1976 1977 Buick LeSabre Base 1977 Buick LeSabre Custom 1975 1977 Buick Regal Base 1976