Ordering heads need opinion? Please!!!!

Actually, what exact MoPar heads are you looking at. MoPar has a set of aluminum heads that are basicly Edelbrock heads with a Mopar omega M on the side. Then they have the Comando and big port comando heads.

Between the ones I have mentioned, for a 408 engine, I myself would look at the Big Port Comando heads. While they will require more work and cost, it is a far superior head and capable for 408 cubes where the Edelbrock should be ported for a 408. It is a small head for a 408 engine.