Normal torque for a 3/8-16 grade 5 bolt is usually 35 ft/lbs. Due to the position of the camshaft lobes it's not uncommon for a few valves to be pushed open a little as the rocker stands are tightened. Be sure all the pushrods are seated in the proper relationship on both ends.
You can also snug the bolts a little and turn the engine to a different position to minimize the amount of strain on the rocker shafts as you tighten them down.
Jerry

"It is better to be silent and be thought a fool than to speak and eliminate all doubt!" - Abraham Lincoln
Cringe and wail in fear, Eloi- - - - -we Morlocks are on the hunt!
There is nothing noble in being superior to your fellow man; true nobility is being superior to your former self. - Ernest Hemingway
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