OK we are taking in everything you are telling us and we can now see how it runs with the video.
Before going into the cam, I am thinking it is a fuel issue.
Looks to me like it is starving from low fuel pressure at an idle and here is what I am seeing.
Your fuel filter is at a high point of the gas line enroute to the carb. The high point is where all the air in the fuel line collects. If you have ever had a plastic see through fuel filter you will see they are only about 1/2 full of fuel even when pointing up hill.
If you swap in a plastic see through fuel filter for the metal one you have on there now you will probably see that it is air locked being in there on the horizontal.
Now for quick 2nd test, take out the plastic filter and put on a short piece of steel gas line to eliminate the fuel filter all together. I am guessing this is going to eliminate your air lock at idle and it will run better.
Here is my recommended solution, set up your fuel line and fuel filter down by the fuel pump pointing strait up the way mopar did it ftom the factory. Then go up from the fuel filter with s steel line on the front side of the fuel pump to keep it cool and then on up close to the carb, final 6" hook it up to the carb with rubber 5/16" rubber gas line. Just like the photo below. This keeps the excess air out of the fuel filter and sends the gasoline up the line.
Give this a try:
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