I have a question about headers. I have a 68 camaro with a 327. I am replacing the 2 barrel with a edelbrock performer RPM manifold, and a Holley 750 vacuum secondary carb. My cousin is a mechanic and he is rebuilding my engine for me and I told him I wanted to put headers on it, and he told me it would burn my valves or something, I had never heard of this and was wondering if anyone could tell me whether or not this is true, I would appreciate some help!!