So your boundary is: (1) You will not be shouted at over minor issues when the real issue is being left undiscussed. (2) You will not discuss issues with him while he has an empty stomach and is drunk (or at least buzzed).
Sounds good to me. I would probably expand it to say: I refuse to engage in a conversation in which you are shouting at me (unless I am very far away and I can't hear you ).
So, what are the consequences (as far as your actions) of the boundary being violated. Walking away or more serious results?
"Recollect me darlin, raise me to your lips, two undernourished egos, four rotating hips"
).
