Do you want it as Studebaker offered or what works better?
If one wants an as-OEM restoration, then that's the obvious choice, no argument. However, FWIW, the linkage-assist PS is inherently junk.
If one wants a PS which works well, easy to source parts, inexpensive to do the conversion, there are many options. On my '55 E12, which is similar, I used a '90s GM Saginaw big car steering box and a Saginaw PS pump. It required fabricating a mounting bracket, welding the frame K-member and reaming the Pitman arm to match the Studebaker reach rod.