Possible Idea for Stalling Problem-77 New Yorker

I have been thinking quite a bit about my Chrysler's drivability problem, and after some time, I have come up with a few ideas. For context, it currently runs pretty good with the throttle open, but it has substantial off idle troubles, with stumbles and backfires. This is especially bad after warming it up. Here are my ideas:
1) Bad carb quality-I sent my Thermoquad to Dana to eliminate this issue as I know I can trust his work.
2) Fuel Pump-This issue never appeared until my mechanic...

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