As a stating point for science, Man is above the animals and separate from them is less useful than we all came from the same stuff.

"being made in Gods image surely relates to things other than body parts."

Of course it does, if you believe that Genesis is allegory as I do. But if you are insisting that it must all be taken literally, which is the basis of creationism, and "Creation Science" and all of that then you are stuck with this.

Image.

An image (from Latin: imago) is an artifact that depicts or records visual perception, for example a two-dimensional picture, that has a similar appearance to some subject–usually a physical object or a person, thus providing a depiction of it.

Image refers to visual perception, not souls or intelligence or anything intangible. Then you are left with if a pigs heart is like a man's and man's is like God's then Pigs hearts are in the image of God's.

On the other hand if it is all allegory, you can simply say "I realize that Evolution is the best fit for ALL the data we have, though it may not be perfect. AND assuming that God can create everything from scratch in 6 days, it would be a trivially easy thing in comparison for Him to make that 6 days look like 13.5 billion years." IMHO, there is no point in Creationism or "Creation Science" except as something to break into factions and fight over. I say as we render onto Caesar what is Caesar's, so should we render onto science, what belongs to science. We cannot solve scientific questions with religion any more than we can solve religious questions with science.