And i forgot tell you, while running the feeler gauge, if the feeling isnt just past snug, you will adjust a bolt, if I remember correctly on the middle of the rocker arm. Tighten the bolt and the feeler gauge will be tighter, loosen to relax it.
Not quite; somebody has been working on too many small block Chevy V8s...
The adjuster bolt is on the end of the rocker arm, just above the push rod tip.
It's a self-locking-type screw you'll be turning, with no jam nut to hold it; it has enough intrinsic friction not to move, once adjusted.
Hope this helps...
And, twice a year is not over-doing it for valve adjustments on older engines, I think. You can't hurt an engine by adjusting its valve clearances, if you do it correctly. Good insurance... just my opinion.:sign7: