Joe, the bolt(s) that secures the rocker supports (there are 6 of them in the attached picture) is/are loose judging by your picture. This is why your adjusters don't work. All 6 bolts need to be torqued to 20/30 ft-lbs. The supports hold the shafts that the rocker arms pivot on. If the supports are not tight, valve adjustment is an act of futility. I hope that makes sense.
"Adding CFM to a truck will only help at engine speeds you don't want to use." "I found there was nothing to gain beyond 400 CFM."
