Question about bridling? please help.?

Do a lot of ground work with him if you have extra time. When he tries to bite, whack him on the nose really hard. I know that sounds mean, but another horse would kick him if he tried to bite them and a hit is a lot nicer than being kicked by a horse. Also, horses won't har a horse that's higher in the pecking order than them so to him, you must seem lower in the pecking order than him. The ground work will help show him that you can tell him what to do instead of the other way around.