OK, good, looks like the right carb. Later models had a synchronized carb and mag.
Just install the lever with the setscrew in the notch of the throttle shaft and you should be good to go.
You might want to install the barrel first, then the spring, then the cover. Once all that is in place, install the lever so that there is some friction in the detent position, but the lever still moves easily. That is, don't slide down the shaft all the way before tightening the setscrew.