The Fleetwood brochure archive doesn't go back that far, nor does the Ford F53 chassis documentation on Ford Fleet. Maybe find one for sale on sites like RVTrader or PPL and see what info is included?
Or ask more specific questions and somebody here can often answer. I had a '96 Southwind (a sister model) and many others here once owned or still have similar coaches.
Former owner of 2004 American Tradition and several other RVs
Home is in the Ocala Nat'l Forest near Ocala, FL
Summers in Black Mountain, NC