Power steering help

[Security guy]

Hey Everyone, I'm a newby on here, so if i'm not doing something rigt, feel free to correct me. I just bought a '71 short fleet (thanks to this forum), and the first thing i need to do is add some power steering. I'm new to this body style, so i don't know what steering boxes will fit. The '67-'72 trucks are harder to find so will a power steering box off a '73-'87 fit on my frame? Also, where's the best place to get a front end rebuild kit? Thanks everyone.