Wont run, please help

[Charley Lillard]

No that is not ZERO lash... Zero is when it doesn't move up and down anymore before you start depressing the plunger in the lifter. You have plunged the lifter all the way and then opened the valve 1/2 turn. I would get the clips that snap on the rocker arm to keep the oil from spraying and adjust them running since you are this far. With it running, back off a rocker till you hear it clacking(means there is clerance between the and the valve)..Then slowly tighten till it gets quiet, then slowly tighten 1/4 turn or 1/2 turn..either one will work.