I agree, The header companies know where the steering box is located. Even if the shock towers are a little out of spec the steering box shouldn't move.
If you look at the exits, you can see that they are at around the same place as the stock exhaust manifolds; they didn't try to re-engineer that part of it, and the best part is that these headers come with 1-5/8" primaries and a 3" collector.
Sure, they're shorties, but they do just fine, and the price is SURELY right!!