Mild Built 340 Timing/tuning help?

Garrett Ellison said
It's almost impossible to add enough timing to a 9:1 or less engine on 110 leaded to make it ping! I will say you've got your mixture in a happy place. If it's at all rich in the low to mid circuits with the BKR6E plugs they fuel foul pretty quickly. We discovered that when re-setting the float height and air bleeds on a pretty well used carburetor with the 392 stroker.

Yes, I have had that issue of it running rich, idle and primary circuits. I do have a wideband o2 installed, I will probably be making a thread asking for help regarding that soon lol. I figured I would dial in proper timing before getting too deep into swapping PVs or rejetting, etc. Unless I am totally going about this ***-backward, in which case please advise! :D