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Re: headers..
I agree with Sinister on this one. You have other issues to deal with first. Don't take too much advice from an chain parts store clerk seriously. Most of them are only reading the ads and poster flyers they get from HQ.
Headers won't do much good if you still have everything else stock. If you can't get more air and fuel in, you can't get more out. The stock ram horn manifolds flow pretty good and are highly underestimated. Most truck and passenger manifolds had a 2" or 2 1/4" exhaust outlet. The manifolds on Vettes had 2 1/2" outlets, which are better but not necessary. A good exhaust system with the stock manifolds will still work plenty well enough for your engine.
If you do decide to get headers, I recommend getting well known brands like Hedman, Hooker, Sanderson, etc. You can get the plain black painted ones for under $200. When you start getting into ceramic coatings and stainless headers, the prices go up. I've never owned a set of Hooker headers, but I've had two sets of Hedman that never gave me problems. I had a set of the cheap Advance Auto headers on my truck before. They were decent headers AFTER I put the good copper gaskets on them. The paper gaskets they come with are better to be misplaced in the garbage can.
My suggestion is to wait until you build a better performing engine with better components and get a good set of headers instead of buying cheap ones to get you by for now when you don't need them.
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