If the motor can breathe, there's no sound like open headers. Our circle burner motors ran just fine with open headers, no burned valves in ten seasons.
On a stock motor it's retarded, but that's just one more reason to run a hot motor . . . . . . right? ;)
For my '29, I think I'm going to run Supertrapps but I'm going to modify them to fit up into the collector so I can preserve the look of open headers and still keep the fuzz happy.
"It's not the size of the dog in the fight, it's the size of the fight in the dog."
"Do what you can, with what you have, where you are."