REPLACE VALVE LIFTERS AS PER CUSTOMERS REQUEST?     DOES THIS MEAN THAT THEY CHANGED THE VALVE LIFTERS AND IT MADE NO DIFFERENCE TO THE POOR RUNNING CONDITION OF THE ENGINE?  OR IS THIS ANOTHER SUITATION WHERE THEY SIMPLY CHARGED FOR SOMETHING THAT WAS NEVER DONE.  AS IS THE CASE IN MOST OF THESE OTHER INVOICES.  I'M NOT A MECHANIC.   I DIDN' HAVE THE FOGGIEST CLUE AS TO WHY THE ENGINE WAS OPERATING SO POORLY.  NEITHER DID MR FEDERINKO.  HOWEVER ANY REQUESTS FOR SERVICE WOUL HAVE BEEN AS PER THE RECOMMENDATIONS OF MR. FEDERINKO