Magnum engines in A-bdy ???
At this point in time, it appears that Mopar Perf has discontinued ALL intake manifolds for Magnum or LA. Some still say "back order" but even the valve covers are now on BO.
If you want a little more on top, remove the center divider and cut bottom of runners off for extra 500-600 rpm. Other than that, its Hughes Air Gap FI. We should have our new belly pans for kegger soon, just got off water jet table and will be $99 with gaskets, not $150 :D
We have several choices for pans, sounds like you are on a budget, so I would suggest stock 360 w pick up for $125 shipped. Better quality pan than scummit one. pm me if you are interested. We also have FI tank and fuel line kit to make install super easy.