I feel it was appropriate to begin this new topic instead of continuing:
SAAC Forum► The Cars► 1968 Shelby GT350/500/500KR► 428 PI Exhaust Manifold Question
Not only is it my long-time /observation/experience that original 1968 GT500s are equipped with the exhaust "flapper" control valve on the RH exhaust manifold of the 428 PI, the part is clearly supported by Shelby documentation.
SAAC Forum► The Cars► 1968 Shelby GT350/500/500KR► 428 PI Exhaust Manifold Question
Not only is it my long-time /observation/experience that original 1968 GT500s are equipped with the exhaust "flapper" control valve on the RH exhaust manifold of the 428 PI, the part is clearly supported by Shelby documentation.