You can, with work on the carbs, make them idle in gear at 650 RPM
Do you know the doors above the metering rods and springs? If so loosen them up and slide them over halfway so you can watch the metering rods and pistons, start the car up and watch them, if they stay down at 1100 RPM lower the idle RPM to see if they stay down at the lower RPM
If not you need to either replace those springs with weaker ones or trim off one coil at a time on them until the pistons stay down at idle in gear
Been there, done that, you can do it also
Those pistons act as power valves in a Holley, they need to stay cloesed at a idle in gear
EDITED, adding initial timing also helps at idle
Just watch your total timing, most pump gas iron headed hemi don't like much more than 36 degrees total timing, especially with todays pump swill