I remember these times well and the following QFR from the WT explains the view at that time. (Quote in part only)
I never knew anyone who had a transplant as the 'cannibal' label probably put them off. I did know a brother who had a blood transfusion and nothing was done, though he was not a 'servant' at the time.
George
*** w67 11/15 p. 702 Questions From Readers ***
● Is there any Scriptural objection to donating one’s body for use in medical research or to accepting organs for transplant from such a source?—W. L., U.S.A.
A number of issues are involved in this matter, including the propriety of organ transplants and autopsies. Quite often human emotion is the only factor considered when individuals decide these matters. It would be good, though, for Christians to consider the Scriptural principles that apply, and then make decisions in harmony with these principles so as to be pleasing to Jehovah.—Acts 24:16.
First, it would be well to have in mind that organ transplant operations, such as are now being performed in an attempt to repair the body or extend a life-span, were not the custom thousands of years ago, so we cannot expect to find legislation in the Bible on transplanting human organs. Yet, this does not mean that we have no indication of God’s view of such matters.
When Jehovah for the first time allowed humans to eat animal flesh, he explained matters this way to Noah: “A fear of you and a terror of you will continue upon every living creature of the earth and upon every flying creature of the heavens, upon everything that goes moving on the ground, and upon all the fishes of the sea. Into your hand they are now given. Every moving animal that is alive may serve as food for you. As in the case of green vegetation, I do give it all to you. Only flesh with its soul—its blood—you must not eat.” (Gen. 9:2-4) That allowance was made to Noah, from whom every person now alive descended. Hence, it applies to all of us.
Humans were allowed by God to eat animal flesh and to sustain their human lives by taking the lives of animals, though they were not permitted to eat blood. Did this include eating human flesh, sustaining one’s life by means of the body or part of the body of another human, alive or dead? No! That would be cannibalism, a practice abhorrent to all civilized people. Jehovah clearly made a distinction between the lives of animals and the lives of humans, mankind being created in God’s image, with his qualities. (Gen. 1:27) This distinction is evident in His next words. God proceeded to show that man’s life is sacred and is not to be taken at will, as may be done with the animals to be used for food. To show disrespect for the sanctity of human life would make one liable to have his own life taken.—Gen. 9:5, 6.
Continues on and on and on.....