Performance timing
Turn the distributor and remeasure timing at one of the rpms you measured previously.
Something between 600 and 950 rpm will be best.
Then check a couple other points.
Put that all in your notebook.
Example: Turn the distributor 'til timing at 950 rpm equals 4 less than before; that is 21* BTC.
Then see what you can do with the fuel mix etc.
Note how much you turn each screw and the effect.