So I just bought an 05 screw fx4 and im starting all my mods but im going to service the engine as well, it has 52k miles on it. I figure now's a good time to refresh everything. So after I fight getting the old sparkplugs our and breaking them off and fighting to completely get them out (LOL, like I've read so much about on here), what set of spark plugs are good replacements, or do I just get the same?

 

Motorcraft these trucks seem to like those better

 

Motorcraft, the recommended one, a heat range colder.

 

are the autolites bad? Has anyone run them?