Need Advice on Exhaust

...and sometimes a V-8 doesn't have the typical V-8 "musclecar" sound! Back in the late 60s/early 70s there was a big-block Mopar that ran at OCIR with 180-degree headers and sounded more like an angry sports car than a big-block drag race engine.
Have you ever heard a set of open 180-degree headers on a V-8? Do any of you remember what the "bundle-of-snakes" headers on the first Ford V-8s run at Indy back in the 60s or the Ford GT40s that ran at LeMans? Definitely not a V-8 sound.
Here's a link to some info on 180-degree V-8 headers if you've never heard of them: http://www.burnsstainless.com/bundleofsnakes-2.aspx