TonyaHi Mark, I uploaded the owners manual I got with my 1984 Sirius 21. This manual did not originally come with my boat because the notes on the front cover (sorry for the messy notes, not mine) refer to sail #461, but my boat has sail #465.
Inside the front cover it does say "First Printing April 1978", so I think this will be a good read for you.
You can find the manual at "Owner Resources" then "General Downloads".
Enjoy
Tony
Sirius 21, #465, ynotsail
How do I get to owners resources?