First, it needs to have a PCV valve either coming from the carb, or at the back of the intake manifold vacuum port to one of the valve covers so crankcase pressure doesn't build up and create oil leaks for one.(and there are other reasons) If you don't want to run one from the carb and use the intake vac port, then just cap of the port on the carb.
I wouldn't even worry about getting the original air cleaner assembly unless you can find a used one somewhere, but it will be just fine without it.
The carb will be difficult to rebuild if you have never done one before and you would need to get a large can of carb cleaner to dunk all non rubber parts, and some air pressure to blow out all the very small passages. You might want to have it professionally rebuilt, as that would by far be the best route.
Will that carb be better than the Edlebrock? Yes, if it is rebuilt professionally.
The choke from the Edlebrock will not work on the Q-Jet. You will have to go with the choke stove that i mentioned earlier, or MAYBE find an electric one that you could bolt to the intake manifold and run the linkage to the carb. You can not bolt any kind of elec choke to that particular Q-Jet.
Below is the diagram of the carb with the ports labeled for you.
If you still have further questions just reply, if not please don't forget to click on accept so i receive credit for helping you.
Thanks for asking!