I personally use "brake-fast" bowls, that are designed to make the dog eat slower. A cheaper alternative to this is placing a large rock in the center of the bowl to make the dog eat around it to slow eating. I had to do this with my lab/pit bull mix due to a bloat scare we had...not fun.
You can find a similar bowl online, like these
ProSelect Plastic Slow Feeder Dog Bowls | PetEdge.com
Edit- one thing I also forgot to mention is that you can try feeding him via interactive toys like kongs or buster cubes. Provides a lot of mental excersize and makes it impossible for the dog to eat overly fast.