87 S-10 truck, 2.8 ltr

I figured out the valve closed deal no ive got two more questions
1. When adjusting the valves(lash etc) in the no 1 position the #3 exhaust valve is to be tightened, but the nut is barely on the threads before the lash is removed, then in the #4 position it is really loose and I know it will rattle like crazy if left that way, what am I doing wrong?
2. There are three marks (lines) engraved on the crankshaft, two small, and one large, the large one is the actual timing mark correct?

Ok got it on the timing mark
when that number 3 exhaust valve is tightened in its no1 position, the nut of the rocker arm is much higher than all the rest when the lash is gone. But when rotated 180 degrees in the no 4 position it is really loose, so loose I can almost pull the push rod out, that cant be right it would make alot of noise right, im goin nuts here. I can push down on the lifter with the rod and feel it spring back up

the adjust ment just doesnt feel right, no other valve feels like it in either the #1 or #4 position

Never took the lifters out, Im having to make repeated rotations as the lash increases, every time I think they are adjusted once I return to either 1 or 4, I feel movement in the rods, is this normal, repeated adjusting?