Needs throttle or choke

I let my Cuda set for 3 weeks without starting her. Now she doesn't want to run unless I keep working the throttle or close the choke. I cleaned out my Edelbrock carb and reinstalled. No luck. I installed another Edelbrock carb. Same results. I installed a Demon carb. Still no luck here either. As soon as I let off the throttle the motor dies instantly. I checked my inline Russell fuel filter. It's clean. Tried W-D40 to look for a vacume leak. No luck there either. I disconnected fuel line and let the pump run. Getting lots of fuel. So, I am starting to think something electrical perhaps.