Develop a language pair for Highland Puebla Nahuatl (azz) and Western Sierra Puebla Nahuatl (nhi)

My idea is to develop a language pair for Highland Puebla Nahuatl (`azz`) and Western Sierra Puebla Nahuatl (`nhi`). Both are endangered variants of Nahuatl (`nah`, but different branches), and are in contact where they are spoken. `azz` is a higher-resource language with publications and government materials, whereas `nhi` is substantially more endangered with only some short stories available. There are monolingual repositories for both, so I'm interested in developing the bilingual dictionaries and transfer rules. This would really nice to have, especially since speakers of both languages often live in the same or neighboring areas, and there is interest in being able to translate materials from one variant to another.