Stumped and Frustrated with a Holley 670 Hesitation

Update on my crappy *** carb!

When I go WOT either rolling or from a stop the whole gurgling thing is now gone and it doesnt seem like its going to die. So that is a step in the right direction. I still have the hesitation or delay what ever you want to call and and I still have that whistle as I let off the gas from WOT. Seriously it sounds like a turbo whoosh or whistle. I dont get it.

So again I changed the primary float level so it wasnt so high, brought the secondary float level up slightly, changed to 69 jets on the primary's, and adjusted the accelerator pump level.

I did a couple checks when I got home. First the A/F screws. I turned them both in one at a time and the car wanted to die, then re-set them. The next thing was the plugs and they were black! Sooty Black! The only ones that had some color to them were 7 & 8. 7 having more of a tan color than 8 did. Now please keep in mind this was not after a WOT and shut down scenario. Just taking the car for a drive opening it up and bringing it home. I know black plugs are not good, but Im not sure where to go from here.

Last thing I wanted to ask about is this.. Sometimes, not all the time, when I start the car the start will drag. Is this a symptom of timing?