Which Carb??

Why no the Holley? Everytime I drive the car for a distance , shut it off, restart the car with in a short duration, it won't run worth a **^. It idles horrible, loads up and stays that way until I drive again for a while. It will do the same thing sometimes on a first start of the day. Also it seems when the motor gets hot, stop and go traffic the idle again becomes erratic. I am very sure it is carb. At first I thought it was the old point igntion problem but I install the Mopar Electronic kit into the car.

THe EDDY carb in the Performer or Thunder series only come 600 or 750 or am I wrong?? For a Street only car I would prefer a 650 or 670 but seems not avaiable in the Eddy Line?