Dura-Spark is one of my favourite recipes for getting stranded with no spark!

(I have opinions, too...this kind of thing is why they make more than just one flavour of ice cream)

You do have a point about needing to protect against corrosion; most of the HEI modules (4-pin types especially) were designed to live inside the distributor, not out in the open.

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一期一会
Too many people who were born on third base actually believe they've hit a triple.

I've never been stranded by a Dura-Spark II module. I only ever use Motorcraft brand modules sourced from the junkyard. Preferably from the most deferred maintenance vehicle I can find as its the least likely to have been changed. I think all aftermarket modules these days, regardless of application, are somewhere between extremely suspect and outright junk. My experiences with the aftermarket Mopar modules sure reinforced that!

I figured that the rotor should trail the cap terminal a little at no vacuum advance since the advance can will "pull" it in closer to aligned. What I thought I was seeing was well outside of that.

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Thom

Cross-threaded is tighter than Lock-tite