Just adjusted the valves on my 350. Started at cylinder #1 at TDC on the compression side. Adjusted that cylinder then moved crank 90 degrees then adjusted cylinder #8 then moved crank 90 degrees then next cylinder in firing order did this until all valves where adjusted. My question is when setting the lifter preload some of the rocker arm nutswould only tighten 1/2 a turn all the way and some would go 3/4 of a turn. Will this be an issue later on. Some guys on another site say 1/2 turn is ok. Also with type of rocker nuts I have they say have to adjust the sets screws. What should I do ? Picture us of one of the rocker arms and nuts.