Thanks to everyone for the information. Knowing how makes doing easy.
I have done the power steering conversion on several '60-'66 Chevy/GMC trucks, both 2wd and 4x4, as well as, 1/2 ton and 3/4 ton. It is a relatively straight-forward conversion. The key, in my opinion, is to have all of the items necessary for the conversion or you will hav your truck down longer than necessary and make several hasty trips to the local autoparts store or web searches for the a few vital items.
Complete kits are available online. I sell a complete kit, born out of the frustration of gathering the parts from several sources and hoping everything plays well together. If you need some technical support, here is a good write-up on the process:
http://www.persh.org/pickup/steering.htmIf you need additional information, please feel free to contact me and I will assist you with the process.
I hope this information is helpful and keep us posted on your progress.