So when Banner turns into the Hulk now every part of his body grows but his head, correct? What year did that start?
I don't know what year it started but 2 of the most popular HULK artists have drawn him that way. Dale Keown did as far back as the 90's and Mike Deodato also draws him like that as well. Modern artists really tend to pump up and focus on his body while leaving his head proportionally smaller. It's been going on for at least 20 years now.