318 Spark Plug Gap?

FWIW... I found out long ago that there ARE differences in plugs. My 10.3 SCR 351C would do fine on Champions and I'd get 10k miles or more on them before they would literally 'wear out' with the high temps eroding the electrodes. Autolites would last <5K miles and their electrodes would be eaten alive if I kept them in that long.