Ammonia can kill you. I used to help a commercial refrigeration company years ago. Ammonia will go straight to moisture such as your eyes or lungs. A major vapor leak can clear a production facility quite quickly!
Any fuel source can kill you if not used safely. Ammonia is the 2nd most manufactured chemical in the world and is already used as a fuel, just not on a wide scale. It would likely be in tanks similar to propane or LPG. There is some information about the safety features that would have to be implemented here: https://www.osti.gov/etdeweb/servlets/purl/20607161
1970 Dodge d100/eventually going on a 77 D100 frame
