I really appreciate all the response. And welcome any thoughts. I'm likely not too far off.
Tomorrow will check fuel pressure if I have to tape a gauge to the windshield.
(I am running 89 or 91 octane with no ethanol, so the pump says)
The only disadvantage to cold plugs is that I risk fouling, right? (But sure don't see any hint of that with the MSD box, even when I was at a much richer mix.)
