The 71-73 Mustangs, like Ed's, use a Saginaw 800 steering box……huge improvement over the previous power steering system used in Mustangs.
Bought a saginaw 800 box out of an IROC Z (fast ratio, high effort) for my son's 73 Mustang convertible project. Different mounting points, so we may have to swap the IROC internals into the Mustang case, but should be a great upgrade over the factory box.
