Air/ fuel tuning

When you say timing. What's the best way to know if it wants more or less. It's got locked 28 so for idle I would think that would be good.

Seems quite high for the jets to be taking over ?? 3100rpm can this be the secondaries at all starting to richen it up?

I could go a 76 . The WOT would still be pretty good like that. Just get a lot of mid throttle readings hitting 15s maybe even a 16 here and there.