I think all you need is a REZ Engineering bracket (or a homemade equivelant) and a mid to late 70's P/S box from a 4X4 truck to convert. It will need to be from a 4X4, the pitman arm location and shape is different than that of a 2wd. You'll have to adapt a rag joint to the end of the 63's steering column to connect the box to the truck. Then all you'll need is the pump, belts and hoses to finish it up. Maybe a front end alignment to re-center the steering wheel,
Scott