I'm going up against the CA smog man next year. My current 3x2 (ancient) header has sprung a couple substantial leaks at the head that I think are due to the flange warping, and I don't think will be fixed by a new gasket, so I'm accelerating a repair that I was going to put off. I have an original '78 exhaust manifold that's rusty, but complete. It is a giant heavy beast, but I think with a sand blast it will clean up ok. The alternative is new a smog-legal header. Not as original, but it will save me at least 50 lbs off the front axle. My truck is very original, including paint. I'm leaning towards the original manifold. It should be cheaper as well. Edt: I have a nice stock carb that will be heading out to JimC for some massaging. It has a craptastic Holley on it now that likes to dump gas into the engine when you hit a bump going uphill. Thoughts?