Did a power steering swap on my '67. The donor truck was an '82 GMC.
We took the pump and steering box off the '82 and bolted it right on to the '67. Had to trim a small piece off of the fenderwell to clear the hoses, but other than that we were home free.
While we were at it we got the power brake booster off the '82 and swapped it in to. If you want details on that let me know.
Long story short - this is an easy swap, doesn't cost much and makes a HUGE improvement in driveability!