Mopar Performance Lifters

How did you adjust your preload. Bring your cam around to the base circle and reduce pressure on the push rod till you have zero preload. You shouldn't be able to move the push rod up or down but should be able to twist it gently with your fingers. And screw your rocker adjustment down 1/2 to 3/4 of a turn and lock it in. Some adjustments might very slightly but that should put you definitely in the ballpark to rock and roll.