Can you set them the way when you loosen them until they clack then tighten them until they stop.. them tighten them a half turn more?????????

 

No, these rocker arms get tightened down all the way, with the valve fully closed then torque each one to 22lb ft

 

no need to go through all of that. just torque them to 22ft. lbs then turn the engine over by hand and stop and retorque every 90 degrees (you'll ned a 24 mm socket to turn the crank) remove the spark plugs to make it alot easier

 

^^^ beat me to it

 

That procedure was for stud mounted rockers, where pushrod set preload and wipe pattern and the rocker position was fixed by the valve stem/spring and pushrod. On the LS1, the rockers are fixed fulcrum so the height of the stand relative to the valve stem sets the geometry and the pushrod sets lifter preload. To ensure the rocker is installed correctly, the bolt preload is used, which is set with a torque value. Here is the correct way to install the rockers.