Carb help

A little back story- so I bought a 1970 Dodge Dart in April, it was all stock from my understanding and I had the engine rebuilt, I started Installing everything and when I finally turned the car on it seemed to be very very accelerated, when I pushed this towards the manifold( see picture -what I have my thumb on) It basically slows the revienta Nd then turns off, once released gas flows and again it seems like someone is just flooring it. Can it just be my carb needs a renewal ? Can it be something else like I didn’t put my car back together correct ? And can anyone help identify what carb I have( I’m very new to old cars) I did some digging In pretty sure I have a Holley 1920 carb but I want to know what kind of kit would work to rebuild it. All the numbers I found are in the 2 last pictures

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