I bought the complete power steering conversion kit from Heartbeat a couple years ago to convert my Z. Complete with the correct casting pitman arm, all the hoses, clips, new box, deep groove pulley, etc... Wife did not like driving it with manual steer. Fit, form and function are all perfect and for my purposes it looks factory and does the job. Don't know who actually makes it. I'm not concerned with that. It's just on the car until my wife no longer enjoys driving it, then it's coming off and going back to the way the car came equipped when I restore it.