Hi folks, my first mail to the list:

Problem:
  I had a shop redo the top end of my motor (didn't have time).  They
replaced the lifters, but of course not the cam (since only the top end was
done).  Anyway, after a couple of weeks, I got huge valve trian noise.
Pulled the valve covers and found that the rocker arm adjusters for the
exhaust valves on #2 and #4 were disintegrating (from slapping against the
valve stem after becoming loose). Replaced and adjusted  - two turns ala
Bently.  Two blocks later, same problem.  So obviously I have got a bad cam
lobe.

Questions:
was it Kosher to replace the lifters, given that the cam was not being
replaced (i.e. did the different hardnesses cause the lobe wear).

Any other causes of this that someone can identify -- I am not one of those
people that blame the last person who touched it, but this one seems kind of
weird.  Never a problem with the valve train until it gets messed with, then
two weeks later boom?
thanks for any help.