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I believe our trucks came from the factory with Champion plugs. I think going back with those or NGK would be fine, I have read though that these motors act kinda goofy with the platinums or quadfire plugs.
 

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I did the E3 plugs and removed them 3000 miles later. Lost fuel mileage, and had CEL on all the time. A Dodge tech told me to keep with the Champions. I didn't listen and put Autolite platinum in. They will be coming out next oil change. The 4.7 has no plug wires, but coil packs. I just wish someone made coil packs with a hotter sparks.
 
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