The pump doesn't seem like its in the way as much as the steering box is.... if I don't go with headers. Seems like the u-bend /manifold idea might be a little tight w/ power steering box.
That U-Bend could be subject to a lot of modification; you might need to cut it and weld a flat plate on part of the bottom. Since it's not going to be a 500 HP motor, I don't think it will probably be sensitive to stuff like that.
But, what do I know... our car has non-power steering.
