Congrats.......great feeling huh ? I just upgraded, so I can relate.
I'm running latham steering on my boat, and a suggestion that someone made, that actually worked out well, was to get an engine oil cooler and run that on the return side of the power steering. He's done this on all of his boats.
I did this & it worked out well.............no puke tank required !
I run my engines between 5 & 6000 RPMS. And I am using the stock pulleys, so I would have to believe that the cooler is doing the job.
I used a 9 inch cooler, which was under $100 unpainted (I think, only Visa knows for sure - ha). A nice blast of black paint, some custom attachement to the offshore mount below, and I was on my way.
I can't garauntee it will work in your app, but I've seen it done, and did it, and I'm happy with it.