Stock rocker arms 509 cam?

Get the motor warmed up and back off each rocker, with the cam lobe in the closed position, til you can spin the pushrod between your fingers. Then tighten the adjuster til the pushrod JUST starts to lose all the slack up and down, then go 1/4 turn more and snug up the adjuster. Bump the motor over til the next valve is definitely closed and repeat. A more correct way is to use the chart MP made and do it while watching the timing marks and such.