I couldn't adjust them as they seemed to bleed down too easily. been chasing a slight miss since new. at about 1 1/2 or 2 turns past zero lash, it smoothed out and vacuum held steady. while it ran very well, I was concerned they would pump up at higher rpm's. several easily compressed with just my thumb pushing on rocker. new ones are the same! I reset all at 3/4 turn and removed side covers to verify 0 lash. every rocker ticks and has the same slight miss, adding a full turn, it idles perfect and no ticks. the oil barely trickles out top of rockers and 10 lbs at idle, I would swap the pump if it might help but really tired of blindly throwing time and money at it.
