I have to wonder, what does engine size have to do with setting the points or dwell? As Jerry said above, the more dwell (or the narrower the point gap) the more time available for the coil to produce a hotter or higher voltage spark. I really don't think the spark or points care what engine they're sparking for. Of course to little gap is a bad thing too.
If memory serves (sometimes it doesn't these days) .017 is a pretty good setting for points. Back when I was doing work under a shade tree, a pop top tab was often the precision instrument of choice for points. Didn't matter if it was a dual point distributor in a car that was about to school the local fast car or a Ford 9N tractor.
Last edited by moparguy; 01/13/2020 2:18 PM.
