Ensure the longer shaft retaining bolt is installed in the proper location on the rocker shaft. (Refer to 9 - ENGINE/CYLINDER HEAD/ROCKER ARMS - ASSEMBLY) Position the rocker arm and shaft assemblies on the pedestal mounts.Ensure all pushrods are properly located on the lifter and the rocker arm socket.Align each rocker arm socket with each pushrod end.The rocker arm shaft should be tightened down slowly, starting with the center bolts. Allow 20 minutes lifter bleed down time after installation of the rocker shafts before engine operation.Slowly tighten rocker shaft bolts evenly until shaft is seated. Tighten bolts to 23 N·m (200 in. lbs.) .Install the cylinder head cover(s). (Refer to 9 - ENGINE/CYLINDER HEAD/CYLINDER HEAD COVER(S) - INSTALLATION.)