Lateral rocker arm movement

I finally got the 340 running again (finally) but I ketp hearing a tapping sound so off goes the vale cover and I had a few loose rocker(all the adjusters were tight, just needed to be set tighter) and I saw that there is a larer gap between two of the pairs of rockers. The directions say a minimum of .030". one looks a lot larger than that. I intend to shim them to .030" but wanted some opinions on this. Should I leave it or shim it in? Is .030" ok, or should I go looser or tighter?

Thanks,

Dan

PICT0112.jpg

PICT0113.jpg