[Dead Parrot]

Don't be afraid to try more initial timing. My 350 is at 14. Make sure your vacuum and mechanical advances are working. Most stock motors like more timing then the factory specified. If it isn't pinging on acceleration and is easy to start hot, keep bumping the timing up.

Is your vacuum advance on ported or manifold? Try switching to the other one. Use whichever one works the best.

Total timing(initial + vacuum + mechanical) at about 3000 rpm no load should be about 50 degrees or so. Pretty much out of sight of the timing tab.