Magnum Exhaust Port Dilema

Here's food for thought....and I'm not readin all this hogwash to see but I haven't seen anybody talk about the Magnum manifolds. They are much much better flowing....especially the large outlet ones.
Any particular year?? The magnum was made for many years. The manifolds I always recommend are the 96/97/98 360 magnum Jeep Grand Cherokee but I don't know which year magnum heads are the best??