O.K. - First let me say that it is perfectly normal, and indeed, sensible for a dog to bolt it's food. The wolf's instinct remains intact to a greater or lesser degree in all our dogs. For a wolf it is very important to get as much food into it's stomach as quickly as possible. If the pack is unstable or the animal unsure of it's status within it then another pack member may muscle in at any moment. Apart from competition within the pack for food there is always a threat of scavengers, other packs, bears etc. Having your head down and your backside unprotected while you feed is a very vulnerable position to be in!!
The behaviour can have adverse consequences to the domestic dog however. If your dog is really swallowing food faster than it can breath (I had one of those ...Pedro would choke on every meal unless a mouthful at a time was given!!!!) then reducing the size of meals and feeding two or three times a day rather than one large meal can help.

As for your dog's other behaviours... could you give me some examples of how he reacts to people, other dogs, sounds, when he seems most stressed and how he displays it? That would really help me.