Found my dads original 1971 duster!

I had a similar amount of clearance on my Scamp, didn’t have any problems and therefore didn’t buy spacers.
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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