engine vibration

[oldspert]

I have decided to pull my engine and check out why it vibrates so bad. It is so bad I can't drive over 40 mph without it making the entire car rattle. I still have the oil leak so I can address that too. I had a 29 when I was in high school in 1960 and drove 8 miles to school every day at 55 or so mph and it did not vibrate at all. I'm thinking it might be in clutch or flywheel area since I have to push the clutch hard all the way to the floor to shift without grinding gears.