Header Power Steering box ?'s

Hi all

So I finally have to change out my PS box that's leaking. Got a set of Hedman hedders on now, a real tight fit. What other steering boxes would bolt on ? I may also swap out the hedders. I keep hearing Doug's and TTI's. I have a stock (huge) starter that may go away also. (360 with J heads). Not sure about cost of coating existing hedders vs. new ones.
Any opinions/advice appreciated.