Transmission - Comparison of early and late 4 speed transmission cases
Moto Guzzi V700, V7 Special, Ambassador, 850 GT, 850 GT California, Eldorado, and 850 California Police models
Thanks to Charlie Mullendore of Antietam Classic Cycle for sending me this information. In Charlie's own words and photos:
Towards the end of Ambassador 4 speed production, it seems Guzzi revised the case casting in order to use it for the first 5 speed in the Telaio Rosso.
I was comparing 4 and 5 speed cases today and it seems there would need to be even more substantial modifications made before you could have a Telaio Rosso replica 5 speed. Would be an interesting project if one had a need.