360 LA installing Promaxx Aluminum heads

If that header was the 5204 part number then Summit is lying. Like the 5322 and 5303, Hooker is no longer going to make them. And according to Hooker, they won’t be made ever again. Which is sad really but since they can’t be used with power steering I know they were a slow mover.
Those are the A body header if I’m correct.
E body Super Comps are still made. Those are also the ones I said will fit the Magnum and Cordoba.