Carb Question

[kuch72]

I just bought a truck that was kind of thrown together by one of the previous owners. It has an Edelbrock 1407 (750 cfm) carburetor on a stock 73 350. The carb needs to be rebuilt, its not acting quite right. I am thinking that the carb is kinda big for the engine. Can it be metered down for a little better efficiency or should I just find a smaller carb, maybe with electric choke, to put on the engine?

Also, is there a good place to pick up a throttle cable for the truck?

Thanks,
Nate