[markjohnson]

Yes Paul, you pretty much figured it out with the increased resistance making the wires break down sooner. I also wanna say that if the gap is too large with poor quality, stock type skinny plug wires that a spark can be induced from one cylinder wire to another OR just ground out to a valve cover or something, especially the consecutive-firing cylinders of #5 and #7. A friend had this problem with large plug gaps and poor plug wires on a 440-6 Pack Charger. It looked like a Fourth of July Fireworks display when the hood was open at night!