This best selling classic has been completely revised and updated to include the latest technology from Holley Performance Parts. It now includes sections on the operation and installation of Holley's Pro-Jection fuel injection systems, trouble-shooting, repair and performance tuning, and fuel system components. Covers carb models 2010, 2300, 4010/4011, 4150/4160, 4165/4175, and two and four barrel Pro-Jection systems.