Valve adj. The never ending and always debatable topic.
Just out of curosity I checked out Crane's web site.
"With iron block and iron heads, add .002"
With iron block and aluminum heads, subtract .006".
With both aluminum block and heads, subtract .012".
Remember this correction adjustment is approximate and is only meant to get you close for the initial start up of the engine. After the engine is warmed up to its proper operating temperature range, you must go back and reset all the valves to the proper "hot" valve lash settings"
I use to adjust, adjust, and adjust my valves. I finally bought some good rocker arms and (also sold my ford lol) now harldy ever even check 'em.
If nothing is wrong they SHOULD NOT CHANGE between inspections.
If they keep changing, either your "feel" is not precise or something is wrong. Always note which valve is off, how much it was off. If it's the same valve(s) each time look for something going wrong.
BTW I think you should adjust 1 valve, make a pass down the strip and adjust another. Do this until you have them all adjusted! :lol:
I get the motor hot, check one side, then heat it up a little and check the other side. It doesn't take long to check one side, but long enough for it to cool down a good bit by the time you get ready to check the other side.
One good tip. If it's a high compression motor pull the plugs out. It's a lot easier on the starter if you do and really a lot easier if you turn the motor by hand.