I just uploaded a plaintext diff between Pinochet's original 1980 edition and the latest ratified Lagos version (updated August 2020 for the plebiscite). Quite interesting to follow the changes. The git tracking also has the 2005 version. Sorry for the Spanish.
https://github.com/pbleyer/ConstitucionDeChile/blob/master/C...
Git repo at https://github.com/pbleyer/ConstitucionDeChile