I've just go a relatively inexpensive timing light (non-dialback, which is recommended with MSD) Could be it is off.
And I'm not very experienced with reading plugs. I'd like opinions on the plug heat range, and any info as to timing that can be seen by you guys with more experience.
I could see no evidence of grey or tan at the base of the porcelain (with otoscope) in spite of what I'm told is a fairly fat A/F of about 11.5-12:1. (most sites say 12.5-13 it seems)
