First and foremost, disclosing that you stutter is super important. It removes the elephant in the room, and the interviewer will have much more compassion for you. Even better: do it with a joke or pun of some sort, or bring some humour into it. Then, just do you and let yourself stutter. Repeat after me: it's ok to stutter. Say what you want to say, get your point across and impress the hell out of the interviewer. Take as much time as you need to pause and breathe, and even block. Good luck!