Headers to Manifolds 72 chevy

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I need a complete new exhaust system and decided to go back to stock type manifolds instead of the headers currently on my truck. My problem is now that I got the dr side header off the manifolds I bought to replace the headers will not fit due to the alternator mount on the dr side . I can take the alternator bracket off and it fits but then I have no way to mount the alternator back on . Do I need a different bracket for the alternator or a different manifold ? If anyone can help me it would be much appreciated .This is just one more reason I dont like headers.