Did some Google searches on these things, seems they claim they are good for anywhere from 700 to 900+ HP depending on which spring it has in it. They can be rebuilt and the springs can be changed if necessary.
Found an old thread from this site that said they will indeed bolt to BB.
I have two of them. One looks to be stock as it came from CV, and the other I remember came form Evernham Motorsports. It's brand new and is kind of trick. It has a neat little heat shield and a billet titanium pump arm. I'll probably try that one and see how it goes.
Also have a Clay Smith pump in case this one doesn't work out.