The carb part number shows an economy tuned replacement carb for GM factory engines. This will not be too bad if you are competent in disassembling and tuning Edelbrock carbs. There is a possibility you have a vacuum leak, the carb is not adjusted right and you can get it in the ball park of running OK.
If you want to work with what you have, start by following the procedure of adjusting the idle mixture screws, in the video Mike posted.
If you will put your vacuum line on a manifold vacuum port, you can use it to aid in the adjustment. The port needed will have high vacuum at idle. Plug the unused port.
If you want to get the right carb, I will defer to the Edelbrock users on here and let them recommend something that is working good for them.
If you try the carb adjustment, get back to us and let us know how it went and what you encountered in the procedure.
I will look up the cam card to get an idea of what kind of idle you should have. Let us know how the car idles, rpm, vacuum reading and tip in throttle response. Be confident, sounds like a nice engine.
11 inches of vacuum at 1000 rpm. The cam is going to have some chop to it. If you can swing it, I think you will be better getting another carb.