’64 Cuda wants to die when in gear.

Hey guys,
I've been putting alot of work into my 273 Cuda lately. All new ignition, timing was checked, carb ripped apart and cleaned well, etc. Finally have the idle set where I want it, however when I put it into gear with the brakes applied the engine rpm drops to rediculously low levels. If I turn the rpm up higher the torque converter catches and it stalls, any lower and it idles too rough. Any suggestions? Thanks.
Author: NYCuda