cop power steering box?

What I have is a 72 dart with a slant 6 that I'm swapping in 73 k-member. I getting ready to replace the power steering box hoses and pump. I was wondering if a cob box out of an 89 diplomat would be a good choice? Are the hoses the same or will I have to use different ones. I looked at Napa and the reman cop box is less than a hundred and a quarter. What do you guys think?