Re: Vexing problem.
I foil balled the valves when I did the heads. Also, there's no visual of any interference. No carbon build-up. JWL, no change when the lead is grounded, and the stethoscope test gives a quiet fuel pump, and very noisy valve area on #5, also a bit on #6 but I think that's spill-over noise from #5. Talkwrench, I have a vauum gauge, I'll have to make up a fitting so I can use it.
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