We don't have emissions checks. Most of the emission hardware had been removed in the past along with the o2 sensor, which could reinstalled. My car has AC and cruise and I want that to work. From what the parts store said on the numbers on the carb it is a 6520. The EGR and vapor canister are still present, but not attached to anything. The car has some sort of Holley on it now, but I don't like the way it acts and the stock air cleaner won't fit it. I'm a Neon person, so all of this is new to me.
If you go with the 6520 then you'll need the O2 sensor since the carb receives feedback from it. Make sure the carb has a "Wide Open Throttle Cut-out Switch" as that controls the AC clutch circuit (sort of a metal plate with an actuator that's mounted below the fuel inlet on the carb).
The Cruise Control cable should just hook up to the carb's linkage.
The EGR valve probably will need to be cleaned/replaced. From a front view there should be 2 vacuum valves that are mounted on the thermostat housing on the head. One of these control the EGR & Canister purge. Vacuum hoses are hooked up to these and to the carb, EGR & Vapor Canister Purge Valve (on top of the canister). The other controls the Air/Smog Pump on the side of the head that you said was removed. You should have a Vacuum Routing label in the engine bay...
If you haven't yet done already, invest in some service manuals (2 books): https://www.ebay.com/itm/1983-Chrysl...kAAOSw9xJcA-oy
If you go with a 5220 carb then no O2 sensor will be needed. The O2 sensor is mounted on the exhaust manifold and it might be a big PITA to remove the plug. Let's hope the PO put some anti-seize on the threads!
Also, a warning about the air filter housing. Be extra careful and do not over tighten the 2 wingnuts where the housing attaches on top of the carb!!! This could warp the upper part (air horn) of the carb!
There're some pics of my engine & rebuilt 5220 carb in my Album...
Hope this info helps and hasn't made things more confusing!