BEST After market power steering KIT

I am getting ready to put a Power Steering Conversion kit on a
57 T Bird. Was thinking about using ND Gearhead Power Steering
Kit, but upon researching here on HAMB I found a 2007 thread
discussing the kit. The majority of replies were the kit was
junk. Most of the problems were with the GM steering boxes.
Three years later have they gotten any better?
TwoChops

 

There must be many hambers that have used a kit to add power steering.
what did you use and was there any problems?
THANKS for your help.