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My car has been running well for years with a .050" gap.
Nothing special, just Mopar Performance plug wires and plenty of dielectric grease on the plug wire boots and coil pack posts.
I also put a little anti-sieze on the plug threads and lightly toque them to to 18nM.

I tried the expensive Iridiums once but can't say they were any better than the $8 a set of 4 coppers.
 
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