You have an 03 engine that has the extra threads. Pull them. I have never used a torque wrench while installing plugs and never once had a problem. 13ft lbs is just past hand tight.
I doubt you have anywhere near as much crap in the way of pulling your plugs as I do and it only takes 30min for me to change my plugs.
I am willing to bet that when you pull them you will have a couple that are destroyed.
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