Engine Identification Number Code

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Engine code numbers are located on a plate at left rear of the engine block on 4.1L engines, on a pad on the left front side of the engine below the cylinder head on 4.3L, 5.0L (307") and 6.0L engines or stamped into the front of the block, near right side of the water pump on 4.4L, 5.0L (305") and 5.7L engines.