sb headers, other than the tti or dougs????????????????????????

My point in posting that data was that it probably isn't worth it to get headers at all at your intended level of power. Try to get some early ('68-'71) 340 manifolds if you can find them for a decent price (good luck) but if not get some later 340s ('72-'75?), and after that some regular 360 manifolds. I'm looking at getting some later 340 manifolds for my 360 Magnum (~300 HP) I'm building for my Duster to run temporarily. I'll save up the money and get some Doug's headers at some point because I intend to upgrade to Edelbrock heads and a solid cam and hopefully push out 425+ HP. I'm also building my car for handling and road racing and would like to lower it so low-hanging cheapo headers ain't gonna cut it.