Power steering Install

[sixty8chev]

I've got a super deal on a 69 gmc lined up, the truck is straight, clean and he's going to trade me for my old high school monster
( a 79 long box stepside witha 6,8 drop)
the only thing I don't like is it doesn't have power steering and it has the alternator on the drivers side.
So i was kinda wondering what its going to take to get power steering on her,
I'm assuming all the parts that attach to the engine will be straight forward, but I'm thinkin the steering box won't just slip in place of the manual box so i was wondering what i am going to do on that end of the project to make it work.
And on to the next super deal of the weekend.I got 50 bucks to take a 79 van off a guys hand, hes taking the motor and tranny, but i get all the externals like the power steering pump and alternator brackets for that project (kinda handy eh), and i was curious about making the discs and power brake booster work on my other truck? I know that topic is way too overdone, but all the ones i've seen before have been about taking parts off pickups. And lately what i've seen has been about swapping the crossmember, but I was under the impression you could just swap form the balljoints out.
SO if ya actually made it through all that without taking a nap, I'll thank ya in advance for your replies.