Found my dads original 1971 duster!

Hey guys. Need some help please. So this is the carb that the engine builder used. My car builder says he doesn’t know what’s needed to hook it up to my throttle cable. It’s a 727 auto transmission. It was missing original carb, so it’s just the cable that is there.
I’ve looked online and it’s overwhelming, when I’m not sure what I’m even looking at. Any help would be greatly appreciated. I pick the car up next week and he says he might not have it operational…which isn’t acceptable to me. I paid for a complete build

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Sounds like the kickdown linkage is missing, too. Something like this:

Mopar 1967 1968 1969 70 71 1972 3 piece kickdown 318 904 A B Body Charger Dart | eBay

Edit - note that the throttle bracket and arm to the carb will be wrong in that kit. Just an example. Those parts are 2bbl or 4bbl specific, but the rest are universal to the A-Body.