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Re: 1963 chevy truck 1/2 ton big block swap
No there is not enough demand for BBC headers for the '63-'67 trucks. Especially not now with the increasing popularity of the LS series of engines. When GM began offering the big block in the trucks, they made the top flange of the frame narrower to accomodate theexhaust manifolds. This is why the '63-'67's need the top flange trimmed. As long as you don't leave a ragged edge, or nicks where a crack can start, trimming the top flange is not a big deal.
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