Engine/drivetrain vibration?

Again it depends on what was done in the rebuild.. If it had the exact same pistons (original), rods, cast crank, cast v. damper, and had the original tc the motor should have been just fine... If they just changed the bearings or did the heads it should be fine... If they changed any of the major balancing or rotating parts you have the possiblity of it being out of balance...