I rebuilt several and due to the age i would only fix the one that has problems , but it is up to you i always say if it isent broke dont fix it , it seems on most of the repairs on the older bikes you almost always brake something else remember it is 30 years old !!First... A repair manual is your number one tool.
Rebuild both forks, seals, dust caps, bushings, any other out of shape washers and parts you will find once opened up.
Look in the reference and facts section of the forum pages for possible threads, the how to lists, use the forum search tool, and check Goldwingdocs.com site for the how to section for a more by bike listings of articles.
For part numbers and good prices