TQ questions

The electric choke model is the "performance" model, was an aftermarket carb.
Anyone know what the 9080 was originally used on?
The 2 alike that I have had supposedly been recalibrated to be less "smoggy" when demon sizzler had them, that and to rebush the throttle body were the 2 reasons I sent them to him in the first place. Id be interested in what that solenoid hanging off the back was for. And how mandatory it is/was to be hooked up, and to what?
The one with the altitude comp I've found out is probably a 1977 model but I don't know off of what. I've seen pix of some that have a block off plate where the altitude comp is on that carb, was wondering if I could do the same thing with that rear mount solenoid.