Thermoquad idling issues

try 12 degrees, reset the mixture screws to 3/3.5; decrease the idle speed to 750, then try adding some bypass air.
I used to do this by drilling a small hole in the top of the PCV valve, then adjusting the speed screw as may be required for idle speed and quality. When I got it right, I calculated the area of the hole, devided it by two, back-calculated for the new pair of holes, then drilled the plates. Finally, I closed the hole in the PCV valve.
But I don't do that anymore.
Nowadays
I take the carb off, flip it upside down, then using the speed-screw, I set the Transfer slot exposure to from dead square to a lil taller than wide, both the same. Then I make sure the secondaries are closed up tight but not sticking, and finally, I bolt the thing back on.
From this point on, I do not touch the speed screw.
I then reset the mixture screws to 3/3.5, and fire it up. I will set the idle-rpm with timing; 12>14 is usually close.
And finally, I will fine-tune the idle quality with Idle-Air bypass as described above.
That takes care of the idle.
The Power-Timing will have to be re-engineered.

The above assumes that the Fuel-level is correct and is stable, and that the only air the engine is seeing is coming in past and/or thru the primary throttles, plus the PCV, and that the metering rods are staying down..