By the way I found this also in a 2000 service pdf

CAUTION: The 4.7L V–8 engine is equipped with
copper core ground electrode spark plugs. They
must be replaced with the same type/number spark
plug as the original. If another spark plug is substituted,
pre-ignition will result.
page 8D-12 Ignition pdf

the link to upload this pdf manual is on this forum Link to download a free service manual for 2000 durango

Yes i tryed changing the Coils and check them all they were all about 1 ohm i belive i even have the Spare one ... No i dont have a manual Trans its an auto ... but a badass Exhaust so i like to down shift and get the nice loud sound out for everyone to hear lol .. the Spark plugs i used denso irridams (SP?) and no im not getting ne thing when dies and yes they did Indv coil packs on the 4.7l 2000 and up the 4.7 comes with more hp/ rwh than 5.2 ..... yay lol but more Complex motor and understanding hahaha internal timing chain that riuns on the cams inside the valve covers :S