Like OneBad said, take your time and do ONE THING AT A TIME!
Leave the secondaries alone. IMO I think 80 might be a bit much for a primary jump, but then again... Maybe try a 76p/80s and see what happens. For now as long as it idles, regardless of rich, leave the idle screws alone.
And in your situation just looking at the plugs won't tell you rich or lean. Plug reading is a learned art and best done by someone with a lot of experience.
Your EGT sensor is a great tuning tool and will work fine. I personally use a wideband air/fuel sensor.