2 1 Mack ENDT 676 Engine for a 1976 Mack RS600 $4,995 USD MACK ENDT676 300 HP. RUNS OK, WILL CHECK ROD AND MAIN BEARINGS, Serial#: GET, Horse Power: 300 ConditionUsedHorse Power300 HPFits To Make(s)MackFits To Model(s)RS600Will Fit Year(s)1976Stock Number120525-4 MLS Number14023169CategoryEngines Last Updated12/18/2025 LocationUcon, ID, US Sold ByHolst Truck Parts (833) 541-___ SHOWNUMBERCall Seller Email Seller Save More Info