Small Block Chevrolet - Gen III/IV - LSA 20-166BK LowMargin 1955-1957 GMC 100 (Series II)

1955-1957 GMC 100 (Series II)

1998-2003 Buick Century

6 V8 1977 Pontiac Grand LeMans Safari 301/4

7 V8 1977 - 1979 Buick Century Custom 305/5 V8 1979 - 1980 Buick Century Limited 305/5 V8 1980 Buick Century Estate 305/5 V8 1981 Buick Century Limited 267/4

5 - 6 Pulses Per Revolution (PPR)

Small Block Chevrolet - Gen III/IV - LSA 20-166BK LowMargin 1955-1957 GMC 100 (Series II)Small Block Chevrolet Gen III IV LSA If you're looking to swap an LSA or LS engine into your vehicle but your engine didn't come with an alternator bracket or the factory setup is too wide to fit your project, Holley has the answer. The 20 166 Bracket tucks the Alternator in closer toward the engine when compared to the original LSA accessories, giving more clearance where needed. These brackets look truly at home on the LSA engine, so much so that