Anybody know which Cardone Power Steering pump to buy?

[nuggets]

Hi. I need to replace my 20 year old power steering pump in my 89+ Turbo. The stores all seem to have the Cardone brand remanufactured pump. They are asking me if I need the version w/ the Hydraulic Reaction Type Pump or without. I'm assuming our PPS means the hydraulic reaction type, but I'm not sure. Anyone out there know? Thanks.