Chrome moly 5/16" adjustable pushrod fits
400-455 big block Oldsmobile engines. Allows individual adjustment of
each valve for perfect lifter preload and valve adjustment. Pushrods have .040
oil restrictor, leaving more oil at the bottom end and less blow by at the top
end. Adjust 9.550" (+/.187). These can be used with guide
plates if they are installed bottom side up and the intake removed. Max Open
Pressure 300#. Individual.