Another request for the year of a Bike

[wesben]

I've read many of the posts trying to determine myself, but perhaps I didn't go back far enough. My engine case number has 5 digits. CA77 10364. I don't have the frame one off hand. Can anyone help?

Update: The frame # is CA78-106333

Thanks,
Wes

[Eljeef]

OK, I may be way off on this but I think you have a '61 engine in a '64 frame. Can anyone back me up on this? Jeff H.