I have the 353 ct, a 41615 manifold and the 2652 pipe. Now I'm NOT into modifying any inturnal parts in this engine, but seeing how I do have alot of time on my hands and a drimel

Is there any benifit from polishing my exhaust manifold, pipe and where it exits the block?
I'm not looking for any big throws of power but polished exhaust I know will help with the flow and maybe fuel mileage. I'm thinking this won't hurt me.
Bob