Power valve plug #5
If you are confident of your work, you are basically done. You will need to run a power valve plug in this metering block as I did not describe how to modify your carb for a secondary power valve. Maybe in another "thread" I will. At times, you will need to change/adjust the vac secondary metering spring opening rate as vac secondary carbs do not have a secondary squirter.
You will need to clean the carburetor passages very well as there will be a ton of aluminum shavings all over the place. The shavings may even clog the idle mixture screws. If you think it's clean....guess what, clean the passages again.
Like I said at the beginning of this thread, I will not or am not responsible for anything that you did or will do to your carburetor to perform this modification. I'm simply helping my fellow hot rodders out with a simple example of a 4-corner idle mod. If this mod fails for you, I'm sorry. Go back and study the pics or buy yourself a Holley book and read. I have done this several times before and had never had an issue on my carbs. I'm not a Holley expert, just the average Hot Rodder that knows my carbs real well and am often asked to tune Holley designed carbs.
Good Luck and Merry Christmas!!!!