Personally I'd rather go for a mechanical body. More fun. Probably less freaky in the long run too.
To connect nerves is the most difficult thing in such an operation. During the operation on monkeys, everything went well. And what will be in doubt on the person. But the monkey is like a human being on the side of the body so there is a chance of success.
Care to share some sources?
I bet you are talking about the animal experiments of the soviets.
The animals all died after the head transplants. There was no surviving specimen.
Monkeys did not die after a head transplant, they were killed 20 hours after the operation for ethical reasons. In 1970, too, successfully underwent an operation to transplant the head of a monkey, but the body after 9 days rejected his head. After organ transplants, you need to use expensive medicines against immunity to save life.