First off, nice character!
Second - I'd remove independence from the body, and remove the neck tag from the body and instead add it to the Head group. See the Walkbot example from the Start mode - he's set up similarly.
Actually, this is such a different structure that you might be able to get away with just having everything as a body, and putting the head inside of it. Or as a giant head. Not sure but one of those might make him move more as one piece, since his head and body are kinda fused together, you know?
Thanks! Yeah, I removed the independence from the body, but when I do it distorts during the walk behavior instead of moving as one solid block like I want. If I do everything as a body will I still be able to control the facial features the same? Basically everything like it is, it just won't have a "head" group?