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USED MACK ETAZ673A TAKEOUT ENGINE FOR SALE. ALL COMPLETE (HAS CRACKED EXHAUST MANIFOLD) AND RUN TESTED. 6 CYLINDER, TURBOCHARGED AND AIR TO AIR. 2 VALVE HEAD. 60 LBS OIL PRESSURE. 30 DAY GUARANTEE ON THE BLOCK AND THE CRANK. NO CORE EXCHANGE NEEDED!