The limitation on airspeed will generally be for structural and fatigue design limits.Not only that,there would be no genuine reason for the aircraft to be required to go beyond that speed.The only people who are reasonably able to exceed that limit would be the Manufacturers test pilots(usually +10 %) and the certification testpilots(+5 %).The aircraft engines are probably quite capable of having sufficient thrust,but that would depend on weight,temperature ,etc.Also at that structural design point the aircraft is only expected to perform gentle manoeuvres only.However if you were to climb to 36000ft and try to get 360 kts ,you would be at about M1.1;Again ,probably well outside the Mach limit for the aircraft,which I would suspect is appx M.95,again a Manufacturers limit...