If I remember right, you have a L24, and are using 30mm chokes, your idle timing is about 30 (WHEW thats high). right?
Step one, bring that idle timing down to say 20...if you are still using a stock l24 dizyy I would set the timing @ 3000 rpm no greater than 38deg.
The 45F9 should be just fine for your motor....try the timing first..of course you will have to re-tune the rest all of it after that...timing is critical in these carbs. NO VACUUM advance. Set your idle speed at about 900-1100 rpm. Ensure your throttle plates are covering the progression holes..IE NO MORE than 1/2 screw in on the throttle stop screws. Balance Balance Balance...If it sounds like a daunting task....take the drive to Vegas one weekend, and I will help / teach you how to set them up.