For the complete story on Holley fuel systems, pick up . It includes the entire line of Holley products: carburetors, manifolds, fuel pumps, and filters. In the oncise text explains the basics of the fuel-inlet, idle, main-metering, secondary and choke systems. Learn about the 4150/4160’s unique metering blocks. Instructions cover carburetor repairs and adjustment. And a bonus section describes how to choose a carburetor based on engine size and volumetric efficiency. More than 100 photos, charts, and drawings show you how to do it right.