2001 FORD F SUPER DUTY Engine Problems

FORD F250 2001 6.8 V-10 SPARK PLUG BLOW OUT I JUST HAD TWO OF MY TEN PLUGS BLOW OUT ON MY 2001 F250 GAS 6.8 V-10 WITH 161K MILES. I TUNED UP THE ENGINE AT THE RECOMMENDED 100K MILES USING THE SPECIFIED PROCEDURES FOR THIS ENGINE. I KNEW THERE WAS A PROBLEM WITH THIS ENGINE AND WAS EXTREMELY CAREFUL DURING THE TUNE-UP AND PLUG REPLACEMENT. I AM A CERTIFIED AIRCRAFT MECHANIC WITH FAA INSPECTION AUTHORIZATION. I USED A CERTIFIED TORQUE WRENCH TO INSTALL THE PLUG WITH THE CORRECT TORQUE. THERE WAS NO ERROR IN TECHNIQUE OR INSTALLATION ON THIS SPARK PLUG REPLACEMENT. I JUST PAID $720 TO HAVE TWO SPARK PLUG HELI-COIL INSERTS DONE ON THIS ENGINE THAT BLEW OUT THE TWO FRONT LEFT PLUGS. THERE IS A SIMILAR PROCEDURE FOR AIRCRAFT ALUMINUM CYLINDERS (CALLED JUGS) WITH STRIPPED SPARK PLUG BOSS DEFECTS. AN AIRCRAFT SPARK PLUG HAS A LARGER 18MM...