I have a 66 Mustang V8 289, and I'm running a 4brl holley carburetor in it. About a week ago I took off the carburetor, and replaced all the gaskets and even the fuel transfer tube. it stopped leaking, but one of the issues didn't go away. When I accelerate, the car tries to shut off, but if I pump the pedal it'll stay on. It seems as if the car isn't getting enough gas. Any idea what the problem could be. Any ideas are appreciated. Thank you.