My engine starts to vibrate at 65 mph

I have had my cv joints looked at and they said they were fine. It accelerates just fine but once I hit the 65 mph it starts the shaking u can see it in the dash the vibration in the mirrors and the steering wheel and the gas peddle. When I stop no shaking or vibration. I can set it on cruise control and u dont feel the vibration it does get worse the faster I go

It was running fine drove 9 hrs home did real good except when going up mountains had that nasty smell but no shaking or anything. But like 3 months later I took it out of town and it did the vibration. When im driving and im going right into the acceleration not just gunning it. It will grow with the speed. But if I gun it. Boom the vibration starts. Im actually taking it to a mechanic tuesday so hopefully they will figure it out. I will post a message just incase they figure it out and someone else has the same problems they can get it fixed with out having to sell off their arm or leg. :)