I'm Cummins swapping a '74 Duster, thought I'd share the progress.

Oh, I agree this is a terrible idea, and I'm well aware that it is going to be incredibly front heavy, and it will indeed need a lot of reinforcement. I'm tired of seeing cookie cutter builds, and no one's swapped a 5.9 Cummins into a Duster....for good reason, but still.
You need to tell people you were reading about a 5.9 magnum swap and got confused