Power Steering Pump

What are my options with regards to the pump? I could get a stock style Milo tin looking thing, but our 77 Marquis had one, and it leaked like a bastard, so I was thinking a 5.0 pump or something. Are they any different? What about a saginaw keyway pump, are they good pumps? Would it be a bolt-up application, or would it need a custom bracket?

Thanks in advance

Anyone? I've done some reading and found that the Saginaw will bolt up to a 302 but requires a bracket for a 351. This was Bronco stuff I was reading though, so maybe it is a Bronco variant of it, or are they all the same?