Additionally interested in the benefits, if so, of increasing the plug gap. And also a recommended gap setting from experienced electronic ignition users.
The standard plug gap for several decades was .035". ("A thin dime") Wider gaps raise the firing voltage slightly due to the increased resistance of the bigger air space. The only reason for an increased gap like .040, .060, or .080 was on the "lean burn" emission control engines that came around in the mid-1980's. The wide gap was there in hopes that a few molecules of rich enough mixture to light off might be between the electrodes when the spark happened. Most stovebolts run rich enough that a wide gap isn't needed. I was running a shop, and later teaching a professional level trade school course when all those "improvements" were dumped on an unsuspecting driving public.
Jerry
