So hes going to remove his head preserve his conscience from his original brain move it over to a new artificial head and attach it? Thats some Frankenstein shit. I wish them kuck but I doubt he'll survive.
Not to be *that* person but if I was in his place I would do the same thing and if it proves to be suicide at least I would no longer suffer and since it's a terminal illness anyhow its just reaching the inevitable conclusion that much sooner. So if it succeeds and he suffers no severe problems, can walk and so on, he makes medical history if not well there is really no downside.
https://en.m.wikipedia.org/wiki/Head_transplant
Go to procedure, they do a good job of explaining it.