Holley 1920 problem-too rich at idle

One last thing I forgot to mention as you asked something about idle and an idle system. On that carb is a spring loaded screw pointing to the passenger side with a common screw (not a phillips). With the car off turn the screw in with a screwdriver until it stops counting the turns by halfs. Remember how many turns you did so you can back it out to the same place again. It should be no more or less than four to five half turns. In other words 2 to 2 1/2 full turns if that makes sense. This is where these carbs run with the idle mixture screw. Any more or less you got carb issues. My 1920 is tuned at 2 1/4 turns and only requires one pedal pump to start after sitting a week or more. Taking the car out to a show or for a cruise requires no pedal to restart (kind of like a new injected car). If you gotta pump the crap out of it the carb needs to be gone through.
Chas