Talk about venturing into dangerous, uncharted territory!!
The 1st head transplant operation is going to take 36 hours and cost 11 million dollars. All of these facts are insignificant. The real story is, WHY??
Can anyone be that desperate to live, that they would subject themselves as a guinea pig and go through an operation like that. EVEN – EVEN if it medically successful, what are going to be the long range effects with one person living with another person body. I say it is very dangerous territory to venture into.
Is this operation being performed for fame and fortune or for the betterment of mankind?? I will take door #1.
Remember the Frankenstein tale.

Leave well enough alone.
