My 460 came with a set of finned alum. Holley (Ford) valve covers on it. Don't know what they came off of or if they are aftermarket. I like them, an want to pretty them up for my build. I know that prices will vary but can anyone tell me what I can expect to pay for a polishing or chroming? Condition is fair to decent. Ball park figure will do, just don't want to get ripped off.