My carburetor keeps dumping gas

My carburetor keeps dumping gas when it conks out. I have a 360 engine with a holly carburetor. I can hear the gas. Is this a carburetor issue or could this be a timing issue? And it doesn’t seem to idle right. Even when I put that idle screw in or out. Let me know what I can do. I also have a different holly carburetor I can try if nothing works. Let me know your thoughts. Thanks
Could be float adjustment, a heavy float (half full of gas), a bad needle and seat (or full of sediment), or even too much fuel pressure.