I have a Carter, not a Holley?
What is wrong with it?
spray some carb cleaner on it & drive it.
I second RRR on the carter carb being a good carb.
Nice detailed photos of the part in question though-- I commend your efforts--- sure beats the usual my car won't run question with 0 details or photos.
post up specific problems with remedies you have tried & you will get a plethora of answers some good some not.
Lawrence