Power Steering Pump - Help Identify?

I'm "stuck" waiting on parts in my rebuild of my 67 Dodge Dart 270, so I thought I'd clean and check the seals on my power steering pump. I've got the FSM, and it is not helpful as far as identifying the kind of pump I have. A few pictures of the pump is question are here:



The only marking on the body of the pump is the small WCP-diamond stamp. Any ideas on what kind of pump I'm working with here?