The only thing that I can recommend is to put on your resume or cover letter that you stutter and there may be a delayed response during phone calls. You can also also use it to your advantage in your cover letter. “Even with a severe stutter I have successfully accomplished......” I actually have a button on my name tag at work that says that I stutter so if I do, that have been made aware of that fact ahead of time. I probably block more than stutter and it’s been rare the past couple of years, but I do have off days.