Gentlemen, I recently purchased a ram air base and lid for a 71 Mustang with the 429 SCJ. This piece is SCJ only and is certainly very rare. It is not perfect but the flaws are concealed when installed and it is ABSOLUTELY the real deal. NOT a reproduction ( they don't make them for the 429 ) . I bought this from an individual who claimed it was a 351 base which is what I needed . If no one wants it I'll return it to the previous owner for a refund. 479-263-3326 , Dean