340 Sparkplugs
Isn't NGK made for Japanese cars? I remember working on Mitsubishi Eclipses etc. back in the 90's and those engines didn't like running on anything but NGK'S. Mopar ran Champions stock through the 60's and I am not sure if they still do. The modern engines are high tech and Champions were always regarded in the circles I used to hang with as lawnmower plugs. I always ran Autolite in my small block Mopar. I think Autolite 65 in my 340 and 63 in my 318.