This manual pertains to the Holley AA 1G Dual Downdraft Carburetor, designed for International Harvester vehicles from the 1955 model year. The Holley AA 1G represents a specific application of downdraft airflow technology, engineered for reliable performance within its intended automotive context. This component is a critical element in the vehicle's powertrain, contributing to its operational efficiency. This service repair manual in English provides comprehensive guidance for the Holley AA 1G Dual Downdraft Carburetor. It details the carburetor's description, operation, overhaul procedures, installation, service hints, and troubleshooting. The manual is intended to assist owners, mechanics, and technicians in understanding, maintaining, and repairing this specific carburetor model, ensuring its optimal function and longevity.