YES 5.9 Magnum manifolds work in early A bodies. Here is exactly how!

pishta said
The 340/Magnum combo is the magnum driver and 340 Bi-Y passenger. Trouble is the 340 passenger Bi-Y is $200 alone so the $50/set Magnums are a steal. Not even worth the hassle tracking down that piece.

I got my magnum manifolds on Facebook market place for 35 bucks and they where already cleaned and painted. If they don't fit in my dart for some reason I will use them for something I have plenty of small block mopar engines I could put them on for 35 bucks I will use them eventually lol