Charrlie,Thanks for that information. According to the info sent by the next poster (Dave?) the air gap is different for the start and run pickups; .008" for the start (stronger signal at 008") and .012" for the run pickup. It also said that the connector was larger in size, for the start pickup. Handy information RE: the difference. That seems like a pretty wide window (difference) The article alluded to a retard of 4-10 degrees, so, I guess I''ll just have to bite the bullet and look at it with a timing light, for good information...