Assuming no bind in throttle pedal or linkage. Return spring stiff and pulling plates (and keeping) them shut.
You had the carb apart. was it rebuilt ? Metering blocks, base plate, body checked for warping ? ( machinist straight edge)
Pull off the air cleaner, have your girlfriend start the car....you operate the throttle and see what it does. Watch the squirters ,at idle, and see if it's getting a signal to pull fuel. Should not at idle. Different circuit. Check your float level ( fuel should slightly weep out the sight holes) Consider upgrading to Holley Viton needle and seats if they have not been recently replaced. Hard to trouble shoot online,,,,,does the car seem to be running rich at idle, exhaust burning your eyes ?
Holley has a great website, take a look