Well, gee the carb guy says the carb is okay. What a surprise.
But seriously, without a wideband O2 sensor you'll have a tough time figuring out if you're too rich. Maybe, try a coast down and see what the plugs look like.
As for the timing, how people state things varies.
What is your initial timing with vacuum advance plugged. What is your vacuum reading at this point.
What is your centrifugal timing and where does it start and end.
How much does your vacuum advance add.
Do you have it hooked to ported vacuum or manifold vacuum?
