I am in a similar position with my 1969 s30a. Would love any documentation I could find. Would also be happy to digitize or pay to digitize anything the community happens to have.

EDIT

I found a pdf, here's a link to whoever else might be in my situation:
https://drive.google.com/file/d/1cXJBjaxcMNp_aFlSlX8EfpLLXdoVTcKB/

cheers