Confused what to do with a 5.9L serpentine setup

The magnum bracket bolts to the head and water pump. I doubt the water pump alone is enough. But that will help locate and hold it while you modify the bracket to bolt to LA heads. The bracket is aluminum, it shouldn't be too hard to move a few bolt holes.

The power steering will be a little trickier. But I think its worth it. The magnum alternator alone is worth it!