383 Wont Idle with new to me 800cfm DP. Idles and runs ok with Edelbrock/AFB

Well. Good Luck. Can't speculate further about whether its a bandaid or not. Might be be, might not be.
Pretty much covered how to proceed in posts 11 & 12.
I am still working on it. I do appreciate the advice. I did follow your advice from those posts. I was unable to get it to run though. After I slightly opened the secondaries I was able to idle it down. That being said even with the primary throttle plates completely closed I still have no effect from mixture screws.