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154 0508 Insa 02 Z

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Golen likes to shoot for a 0.040-inch quench height for more power and to prevent pinging and knocking. After a thorough cleaning, the inspected 4.0L block is decked to achieve a zero deck height for use with the Fel-Pro head gasket's 0.040-inch compressed thickness and to leave a mirror finish for head-gasket sealing. In our case, 0.020 inch was removed to achieve the proper quench before the boring process began.