Chevrolet 305 CI Engine Build - Mission 305, Part II
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3. This is more like it. The bore size has been opened up to 113/16 inches per side (the max without cutting through the casting), and the exquisite machine work around the openings provides the least possible resistance to intake airflow. Look closely, and you'll see that Miller even uses round-head screws on the throttle shaft to let more air in. View Related Article
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