kb, I can't give you that answer as I haven't run or heard the Stovebolt pieces. What I can tell you is the Clifford headers I am running don't have that usual tinny header sound. The noise around the engine is no worse than they would be with cast iron units. As far as performance goes on a street engine I doubt if any gains or losses from one or the other would even be noticeable particularly in a heavier car like your full sized late model. Go with what will work for you.
