rocker adj. screw , how many threads

i dont have any threads showing on the pushrod side of the arm and i have yet to check to see how the rocker pad (these are crane iron rockers without the roller tip) touches the valve thru its full movement . when i did this a few years ago i had a pair of heads milled .055 but i used stock rockers and .030 shims for the shafts and it worked ok.

this time i bought a set of the ball and cup pushrods for the adjustable rockers and they were supposed to be stock length but i guess they are too long now.