R65 barn find

[Barry]

The miswiring will only have changed the polarity of the spark. Wired correctly the spark jumps from the centre electrode to the side electrode. This is slightly more efficeient than the other way around as sparks prefer to jump from a smaller or sharper point. The ignition would have to be marginal for this to make a diffreence though.

A simplified version of the correct wiring:

[Bill Conquest]

Thanks Barry.. your diagram is a lot easier to understand in my  description !.. now it’s onto the brakes .
Bill