Gene,
I don't know anything about Authentic Automotive, but can tell you the Drag Links with control valves and the Hydraulic Cylinders are all different. In your case the Cylinder will be the same for all Series 4, 6, 8 & 10, but the Drag Link is Series specific and is 58/59 only...that will be the hard part to find.
The pump should be the easy part if you don't care about keeping it original. The original pump was mounted to the back of the generator.
Mike B
