NGK spark plugs breaking.

Newbomb Turk said

RC14YC is the same plug as the N14. The only difference is the N plug had a 13/16 hex and the C plug has a 5/8 hex. The 5/8 hex is much nicer.

Edit: I’ve seen as many NGK and Autolites with bent ground wires, off set insulators and everything else.

I’ve used and still do use Champions in virtually everything I tune. They are easier to read.

So this bullshit that NGK’s are a step up from anything is nonsense.

I’ve pulled and replaced more NGK and Autolite plugs and made more power so many times I can’t count.

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I would respectfully disagree. My first Mopar was a 1971 Charger, that I had transplanted a 340 into. I kept getting a misfire, and would change the plugs out, using the same factory recommended Champion plugs. The misfire always found it's way back. So, having a friend who was a mechanic, I went to him for advice. The first question he asked was if I was using Champion plugs. When I answered to the affirmative, he suggested that I changed to Autolite plugs. Never had another misfire after that.
Maybe it's just my luck, but I've never had good luck with Champion plugs, no matter what the application was. Just sayin'.