Well to be frank, I've run Splitfires for quite some years now and this is the first time this has ever happened to me. But this IS also the first time I've ever tried a gap of .050 as opposed to my normal .034 gap. I went to the bigger gap because a mechanic suggested I had to do so since I have such a hot running HEI distributor.
While on the subject of plugs, has anyone heard of these, or tried em?
http://www.pulstarplug.com/