I picked up a 65' coupe w/429 59k miles, that had been sitting a while. When I first drove it it would die if I came to a stop or if I made a turn. This would happen whenever I wouldn't accelerate. So I assumed maybe bad gas. Since then I've replaced battery terminals, plugs and wires, replaced belts and added a can of sea foam when I filled up. Thinking one of these May have resolved my issue. I drove it today and the same thing. It'll die when at a stop or not accelerating. Do you think maybe the fuel pump is going bad possibly?