problem with a /6 carb..

Had the same issue, cleaned and tuned carb, new fuel pump aswell as drained and cleaned fuel tank. Runs great and no issues anymore. I have a Holley 1920. Sometimes these older cars just need there fuel systems cleaned. Old gas just sucks. Also check the float and excelerator pump. It's sounds like it's dying from a lack of gas. A good run on the highway does wonders. Good luck