I AGREE....THEY SUCK BIGTIME... I went back to iron manifolds this week...I have a set of headers anyone can HAVE if they want to pay shipping from Fla... Iron manifolds are not "tuned" the way headers are, but I honestly dont think it will make a lot of difference. And if either headers or manifolds are bolted up to a 304, then there are more severe breathing issues in the SMALL valves smothering out the engine, than the small gain from headers. Plus hopefully the frequent blown gasket issues are a thing of the past.
And I'd be willing to bet that headers themselves arent producing a lot of sound. It is prob the mufflers doing most of it.
If you want them, pay for shipping to you, and they will not be taking up valuable garage space anymore...