I've had to change many heads on 4.6's and 5.4s because of this.
Its still a problem Ford cant fix.

But back to topic, did something maybe overload the coilpack circuit?
I ask that b/c its unheard of for a coilpack to simply melt like that. Somethings not right.

 

thats what im saying josh. Thats why i wanted to see what the electrode looks like and see if there are signs of detonation there. Because this really looks electrical to me.

 

No the plugs where not changed so they were in there way to long and where the coil pack plugs is melted too. I brought it to someone they said that the plug was not in right and thatmade sparks and that is what did it he think to soon to tell. He will know more when it fix but i will get more pictures when i can get a camera again.