[Gearhead999]

Didn't mean to offend. Just that .26 is a pretty large valve lash. The engine must really make some valve noise at that setting.

And I'm trying to help. But....when you have solid rollers, screw in studs, roller rockers and correct push rods there isn't much left to take up space so you can't tighten them down.

Dumb question, I just thought of.....are you using poly lock type lock nuts on the rockers?? If you are, you have the allen screw screwed out enough to allow it to go on the stud far enough. It isn't buggered up or anything is it?? If you screw the adjuster on the stud, without the rocker does it go on as far as one of the others that you're not having problems with??