I forgot to mention. When I changed the engine out I replaced the engine mounts, transmission mount, the exhaust system mount and the differential mount. Nothing has changed the vibration problem. At about 50 mph I also hear as drowning sound. If I put the car in neutral at 50 mph the droning sound goes away. But I still feel the vibration. I am about to move the trans back and rotate the position on the torque converter to a different position on the fly wheel. It's the only thing I can think of. Any help would be great.