Ok here are the pics, as you can see mine doesnt have a nut holding the clutches on, which according to the manual makes it a pre 1977 Oct 1977 Model, after Oct 77 they went to the nut arrangment on the shaft.

[Linked Image from i55.photobucket.com]
[Linked Image from i55.photobucket.com]
[Linked Image from i55.photobucket.com]