Who would you let rebuild your Holley carb?

My guess is you still have garbage in the carb you rebuilt, or it is not adjusted right.
Tear it back apart and boil it in a crock pot with a mixture of 50/50 simple green and water. Lowe's has a huge crock pot on sale now for $24.
Get on Holley's website and understand how to adjust it.
Dave Emauel has a excellent book of rebuilding holley carbs, find a used one cheap on e-bay and memorize the entire book, you will be surprised how much you use the book.
I use mine alot.
Only use genuine holley parts on the overhaul.

Keep in mind that a new 750 electric choke holley is only $325 new.