First of all if it doesn't run good when it's cold and it runs good when it's warmed up it's likely just your choke not working correctly? But if you're going to go different carburetor and different manifold and don't need any kind of crazy performance then yes I factory manifold 4 Barrel small-block of any vintage would be just fine. A go to carburetor for anyone in this 4 Barrel relm is definitely an Edelbrock 1406 With an electric choke.
