Thanks Mikes66. This statement is an important addition to this Tech Exchange Post...

"Only someone that really knows carburetors and engine tuning well can detemine if this is a fix that will solve your issues."

The guy that made this mod to my carb has been dealing with Holley's for more than 30 years. A good portion of his shop's business is tuning "out-of-tune" carbureted street machines and hot rods. I was just happy he was willing to share and let me shoot photos as he quickly came up with a solution for my idle lean condition.