The was an Owners manual sold with every argosy. As far as repairs go... the systems are the same as a regular unpainted Airstream.
If you are looking for manuals
, you can get reproductions from Helen Davis at Secretarial Services, PO Box 484, Sidney, OH 45365 (937) 492-8885. High Quality reprinted Service and Owners' Manuals are also available from the Airstream Store at www.airstream.com
look under books. If you don't see the year(s) you need contact Airstream - they may have them.
Congrats on your new project - Argosys are cool... but I may just be prejudiced.