I bought the cpp kit from Classic Parts of America for my 52. I got the basic kit, just the frame mount, hardware and steering arm and draglink. I bought a pump and box from the local u-pull-it yard for about $40 total. I also bought the pitman arm made for the conversion from Classic Parts. The basic kit was $95 and the pitman arm was $70. Classic Parts also gives 10% off to stovebolters. I didn't buy the complete kit because I have a inline 6 and the pump bracket included in the complete kit would be useless as they only work for a v8. I just designed my own brackets to mount the pump. It isn't a cheap conversion but it will be worth it.
