Need info for a hyperpac setup

As far as I know Clifford is the only one still making headers for the slant. Mopar performance has discontinued them, and they only fit the 67 up "A" bodys. They do not fit the 60-66 "A"'s, without major work with a hammer. The "regular" Clifford & Offie 4 bble manifolds do show up on e-bay and at swap meets. But if you want the Clifford "hyper-pak" reproduction manifold, It is not likely you will find one used.