Workshop Manual for Bertone Freeclimber 2400 TD

A greeting for all the foreros, I am looking for the cited car workshop manual, I have downloaded from this website (very good by the way) the exploded of the BMW 325 TD since it is the most similar engine that I have found, this vehicle we fit the engine of the BMW 324 TD 115 hp, I would like to have a more exact manual since I have to change components of the gearbox and I do not have this information.

Greetings for everyone and thanks.