I just did this conversion on my 1960 C-10. It is complete and working wonderfully. How do I post photos here? I will send photos of the conversion.
I fabricated a bracket for the gearbox and another one for the power steering pump to bolt to the engine. Total cost of the brackets, less than $3.00. I used a 1990 Surburban power steering gearbox and a 2001 Tahoe power steering pump. Total for those two, $45.00 at the local salvage yard. Total power steering conversion for my 1960 C-10, including gas to go to get stuff, V-belt, and two meals, $72.00.