It depends on what you mean by "Not turn Over". Are you saying that the starter will not turn the engine or it won't start. Two different things here. It is hard to determine the problem if it is not understood completely.
It sounds to me like you are saying that it won't start, rather than saying that the starter won't turn the engine. If it was running good when the belt broke, the intake and carb shouldn't have to have been replaced. Kind of sounds like the person that rebuilt your engine is blowing smoke up your leg to me.
Ed