Mopar Performance Lifters

Screw showing 1-1/2 threads with the pushrod depressing the lifter approximately. .050. However, some lifter manufacturers or cam grinders or performance shops like Hughesengines will suggest a certain amount of lifter depression and/or thread count showing for THERE material. Also a lifter like a variable duration or other catch name will suggest something else.

Have the rocker shafts been shimmed?
This could also change pushrod length.