The Hedman fenderwell headers that Sixpackgut mentioned are something that I always wanted to try as they made more power than anything else on several cars that I read about.
If you run the hedman fender well headers don't you also run into tire clearance issues where a taller tire will hit plus you can't make Sharp turns without them rubbing. I'm not sure just asking
Yes we have them on a Aussie A Body and they rub before you get to full lock, not real big problem on a part time street/drag car.
Headman
My buddy's car had a set just like those on his dart back in the late 70s, called, Headers by Ed, fit better than the hookers and more tire clearance. Changed plugs from underneath