Manual to power steering conversion help

[angelobackwards]

I recently purchased a 1980 short bed with manual steering. I have been searching the web for conversion kits for power steering but can't seem to find any for the 73-87 models. I've googled everything I can think of but can't seem to find what I'm looking for. I keep seeing 63-66 and 67-72. Can anyone direct me to the right place.

Or as an alternative if I were to go to a junk yard and take one what all would I need to take off the donor truck? Steering box and ? I already have a power steering pump just not sure as to what to take along with the box.

Thanks for the help and advice.