magnum exhaust manifolds?

Supposedly the drivers side 92-93 magnum manifold, 2 1/8 id, is better than the 68-71 "A" body 340 manifold and the 68-70 Passenger side "A" 340 flows better than the 92-93 magnum manifold. I have never liked headers for the hassles. May try a set of magnums on a "67" Cuda next week, as I'll be on vacation in South Dakota. I'll start on the Drivers side. I'll take pictures.