I'm pretty certain that it does not matter what power steering box you use. I am providing two links for you, one is to a company run by a guy named Paul. He is touted as being extremely helpful, you may want to give him a call.

http://www.hydratechbraking.com/

Also is a link to a site for Carl Cassanova. He adapted a late model Mustang Cobra hydrobooster to his 68 Camaro. I'm following this route myself on my Camaro and have been thinking about doing it on my AD as well.

http://www.geocities.com/casanoc