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The Dart Iron Eagle block (PN 31122221) has an optional 9.325-inch deck height. A stock Chevy small-block is 9.025 (as is the low-deck Iron Eagle), and the difference can be spotted by observing the distance from the water-pump hole to the deck surface. Another Iron Eagle feature is the camshaft centerline that's moved up and away from the crank centerline by 0.391 inch. Both these features allow longer strokes than would otherwise be practical.

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