318 mopar Carter carb

Not really.

Go to mymopar.com and going the factory service manual for your car.

Look for the fuel section and read up on how it functions.

Also look for YouTube videos for Carter bbd rebuilding.

You don't necessarily have to rebuild the entire carb just need to find out why the needle valve will not stop the flow of gas.

The most complicated part is keeping everything oriented correctly, like that rod goes in that hole with that pin on it, kind of thing. Photos and video will be VERY helpfully.

Also there are check balls (ball bearings) that can fall out if you tip things just the wrong way.

I noticed you don't have a fuel flter and it is very posable that a piece of debris got in the needle seat and is holding the float open.

Let me know what you find.

Just want to remind you that you have an old car and with old cars come unique problems that MANY mechanics today have never seen or even heard of. You obviously can wrench so now let's get your trouble shooting skills honed in.