my 71 small block Nova had Hedman headers, followed by a Hedman 2.5" X pipe with the Flowmaster crossflow exhaust kit and it sounded MEAN.
at idle, it was pretty mellow, but when i got on it and the HOT cam and vortec heads started doing their thing, it sang a song that some have said reminded them of a Nextel Cup car at full speed at Daytona.