Magnum headers on an la?

I don't have any "hands on experience" with using them headers, but through some research I have found others whom tried it and was a no go! I have a set of '92 magnum Dakota manifolds on my '70 dart, with that said, I have manual steering, floor shifter and I fabricated my own motor mounts. I had to trim the steering column outer support tube approximately 2". Too I am running stock steering coupler setup. I would load pictures if I knew how or if it would be of any good to you or anyone else.
That's alot of mods. Dad just cut out a section over the power steering and flipped it over. He then welded it back in, worked perfectly.