LSA or Duration to fine tune glasspacks??

...If you put a glasspack on an old straight 8 instead of the V8....

Good luck finding one still running--but I would like to hear it. 8 cylinders still, by definition, fire every 90* of crank rotation, but will probably sound somewhat different due to the way the exhaust would be scavenged...would it be a solid log manifold, or a tuned header? Or a Dual collector type arrangement like the split headers on a /6?