Too big a gap will make the truck stumble. And they say the coil has nothing to do with it , in the way that it sends power period, no mather if the gap is big or small, it just sends the power. Then , it's the job of the electrical discharge to jump the gap. If the truck stumbles, you need to either lower the gap, or get a more powerfull coil.

 

Strain on a coil does occur not matter what you have heard.
If you want the max spark, run good wires and a set of Plus 4 plugs, you'll make great spark.

 

One argument on not using the split plugs and sticking with OEM is that the arms over the electrode actually sheild the arc. Anyone have a thought?(not to hijack the thread)

 

Unfortunitely, I cannot debate the subject, since all I have is is hearsay, and no real experience.

All I know, is that the biggest gap Rover recommends for a D2, is .042, and with less restrictive wires, I felt comfortable running my plugs at .045 with no counter effect. But it's true that I didn't venture very far!