Try a couple hard launches. I had a car sit once so long that the disc transferred some friction material to the PP/flywheel. A couple good launches burnt this off and life went on. I wouldn't get carried away with this, if a couple good launches doesn't work, it probably isn't going to.
My thoughts exactly. Also, make sure the motor mounts and trans mount are not broken. Especially the drivers side. You can hold the brake, start to let out the clutch in 1st and see if the driver's side of the motor lifts up. Try it in reverse to see if the passenger side is broken. You don't have to get carried away to see the motor lift, but be careful.
